Sgi Modular Infinitestorage™ (Mis) 1.5 Platform Installation Guide
Sgi Modular Infinitestorage™ (Mis) 1.5 Platform Installation Guide
007-5924-004
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Record of Revision
Version Description
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                                                                                                                        Contents
Contents
               Audience.    .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   . xv
               Important Information .      .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   . xv
                   Environmental Requirements .         .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   . xvi
                   Safety Precautions .     .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .xvii
                   ESD Precautions      .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   xviii
               Safety & Emissions .     .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   xviii
                   Electromagnetic Compatibility .      .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   . xix
                   Safety Certification .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   . xix
               Related Publications .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   . xx
               Conventions .    .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   . xx
               Product Support .    .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   . xxi
                   CRU/FRU .        .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   . xxi
                   Purchasable Support & Maintenance Programs           .   .   .   .   .   .   .   .   .   .   .   .   .   .xxii
               Reader Comments .        .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .xxii
               Shipment Overview .      .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   1
                   Inspecting a Shipment .      .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   2
                   Acclimatization .    .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   4
                   Preparing to Install .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   4
               Required Tools .     .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   4
               Installing MIS Platforms     .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   5
                   Installing the Front Bezel Grille    .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   5
                   D-Rack Stiffener* .      .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   8
               Installing the Rolling Rails .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   . 11
                   Shipping Tabs .      .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   . 12
                   Installing the Outer Rails   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   . 12
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                                                                                                           Figures
Figures
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    Figure 1-27   Cable Guide – Single Server with two JBODs Shared         .   .   .     .   .   . 24
    Figure 1-28   Cable Guide – Single Server with two JBODs daisy-chained          .     .   .   . 25
    Figure 1-29   Cable Guide – Single Server with two HBAs, 2 JBODs with Dual I/O .              . 25
    Figure 1-30   Cable Guide – Single Server with 2 HBAs, 2 JBODs with Dual I/O, split . 26
    Figure 1-31   Cable Guide – Single Server with 2 HBAs, 2 JBODs with Dual I/O, shared 26
    Figure 1-32   Cable Guide – Single Server with four JBODs daisy-chained         .     .   .   . 27
    Figure 1-33   Cable Guide – Single Server, Dual HBA, four JBODs .           .   .     .   .   . 28
    Figure 1-34   Cable Guide – Single Server, Dual HBAs, four JBODs daisy-chained .              . 29
    Figure 1-35   Cable Guide – Single Server, Dual HBAs, four JBODs with Dual I/O, split
                  daisy-chain . . . . . . . . . . . . . . . . . 30
    Figure 1-36   Cable Guide – Single Server with Dual HBAs, 4 JBODs with Dual I/O
                  split-share . . . . . . . . . . . . . . . . .                                   . 31
    Figure 1-37   Cable Guide – Dual Server with two JBODs .        .   .   .   .   .     .   .   . 32
    Figure 1-38   Cable Guide – Dual Server with two JBOD shared .          .   .   .     .   .   . 32
    Figure 1-39   Cable Guide — Dual Server with four JBODs         .   .   .   .   .     .   .   . 33
    Figure 1-40   Cabling Guide – Dual Server with four JBOD split .        .   .   .     .   .   . 34
    Figure 1-41   Cable Guide – Dual Server with 2 JBODs with Dual I/O          .   .     .   .   . 35
    Figure 1-42   Cable Guide – Dual Server with 2 shared JBODs with Dual I/O.            .   .   . 35
    Figure 1-43   Cable Guide – Dual Server with 4 JBODs daisy-chained          .   .     .   .   . 36
    Figure 1-44   Cable Management Arm .        .   .   .   .   .   .   .   .   .   .     .   .   . 37
    Figure 1-45   Remove Segments from the End of an Empty Arm .            .   .   .     .   .   . 38
    Figure 1-46   Pry the Joint Apart   .   .   .   .   .   .   .   .   .   .   .   .     .   .   . 39
    Figure 1-47   Pull the Segments from the Arm .      .   .   .   .   .   .   .   .     .   .   . 39
    Figure 1-48   Shortened Arm Ready for Installation      .   .   .   .   .   .   .     .   .   . 40
    Figure 1-49   Remove Segments from the Middle of a Full Arm         .   .   .   .     .   .   . 40
    Figure 1-50   Pry Open the Segment Joint .      .   .   .   .   .   .   .   .   .     .   .   . 41
    Figure 1-51   Pull Apart the Cable Management Arm .         .   .   .   .   .   .     .   .   . 42
    Figure 1-52   Pry Apart the Joint at the Other End .    .   .   .   .   .   .   .     .   .   . 42
    Figure 1-53   Twisting the Section of Segments from the Cables .        .   .   .     .   .   . 43
    Figure 1-54   Join the Spliced Ends of the Cable Management Arm         .   .   .     .   .   . 43
    Figure 1-55   Included: Velcro Cable Ties .     .   .   .   .   .   .   .   .   .     .   .   . 44
    Figure 1-56   BMC Alerts Email Settings Page .      .   .   .   .   .   .   .   .     .   .   . 47
    Figure 1-57   BMC Alert Configuration Success Pop-up        .   .   .   .   .   .     .   .   . 48
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               Tables
               Table 0-1   MIS Server Platform Region and EMC Compliance References            .   .   . xix
               Table 0-2   MIS Server Platform Region and Functional Safety Listing Mark .         .   . xx
               Table 1-1   Intel BIOS POST Error Messages      .   .   .   .   .   .   .   .   .   .   . 49
               Table 1-2   BMC Beep Codes      .   .   .   .   .   .   .   .   .   .   .   .   .   .   . 53
               Table 1-3   Summary of LSI MegaRAID Card Beep Codes .           .   .   .   .   .   .   . 54
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                                                                                                           Introduction
0. Introduction
                  This guide describes setup and installation of the SGI® Modular InfiniteStorage™ (MIS) platform.
                  With two main configurations possible for the enclosure (server & storage, or JBOD—Just a
                  Bunch Of Disks) this guide covers inspecting the shipment, preparing for installation, how to
                  install, and gives examples of some possible external cabling options.
Audience
                  This guide is written for owners/users of the MIS platform who need to install the unit themselves,
                  rather than relying on SGI installation services. It is written with the assumption that the reader
                  has a good working knowledge of computers, servers, networking, hardware, software and RAID
                  arrays.
Important Information
                  The following section details several safety precautions that should be observed at all times. First,
                  the MIS requires the proper environment in which to operate. Second, a fully loaded MIS Platform
                  can weigh up to 220lb. Third, electricity is a major concern, especially Electrostatic Discharge
                  (ESD), detailed later in this section. Please read these sections carefully prior to set up.
CAUTION
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Introduction
CAUTION
Environmental Requirements
                   The following are the environmental requirements for the MIS platforms.
                   Operating temperature: 41° to 95° F [5° to 35° C] (up to 5,000 ft. [1,500 m])
                                   – Derate max temperature (95° F [35° C]) by 1.8° Farenheit [1° Celsius] per
                                   1,000 ft. [305 m] of altitude above 5,000 ft. [1525 m])
                                   – Temperature rate of change must not exceed 18° F [10° C] per hour
                   Operating humidity: 8% to 80% non-condensing
                                   – Humidity rate of change must not exceed 10% relative humidity per hour
                   Operating altitude: up to 10,000 ft. [up to 3,050 m]
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Safety Precautions
                     Do NOT wear loose clothing, such as neckties or unbuttoned shirt sleeves, while working on the
                     unit which can be pulled into a cooling fan or tangled in cabling.
                     Remove any jewelry any metal objects from your body, which are excellent electrical conductors,
                     and can harm you and/or cause short circuits if they come into contact with printed circuit boards
                     or powered areas.
                     Be aware of the locations of the power on/off switch on the chassis as well as the room's
                     emergency power-off switch, disconnection switch or electrical outlet. If an electrical accident
                     occurs, you can then quickly remove power from the system.
                     Do NOT work alone when working with high voltage components or when moving heavy
                     eqquipment.
                     When working around exposed electrical circuits, another person should be nearby, who is
                     familiar with the power-off controls, to switch off the power if necessary.
                     Use only one hand when working with powered-on electrical equipment. This is to avoid making
                     a complete circuit, which will cause electrical shock. Use extreme caution when using metal tools,
                     which can easily damage any electrical components or circuit boards with which they come into
                     contact.
                     Do NOT use mats designed to decrease static electrical discharge as protection from electrical
                     shock. Instead, use rubber mats that have been specifically designed as electrical insulators.
                     The power supply power cords must include a grounding plug and must be plugged into grounded
                     electrical outlets. The maximum over current protection is 50A per power supply. The overcurrent
                     protection must be provided by the facility power grid. All national and local electrical codes
                     apply. Check with your local licensed electrician for details.
                     Power should always be disconnected from the system when removing or installing system
                     components that are not hot-swappable, such as server boards and memory modules. When
                     disconnecting power, you should first do a clean shut down through the operating system, which
                     then powers down the system, and then unplug all power cords (the unit has more than one power
                     supply cord). More information on powering off the MIS Platform is available in the section,
                     “Turning the machine off” on page 36.
                     Do NOT attempt to transport/move a fully loaded MIS system. An MIS system can weigh up
                     to 220lbs. when fully loaded. If the system must be moved, first remove the drives from the
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Introduction
                   chassis. When lifting the system, two people (one at each end) should lift slowly with feet spread
                   apart to distribute the weight. Always follow safe lifting practices when moving heavy objects.
                   More information on moving large objects, requiring a two-person team, is available in the
                   Centers for Disease Control’s, “Ergonomic Guidelines for Manual Material Handling”
                   (http://www.cdc.gov/niosh/docs/2007-131/pdfs/2007-131.pdf)
ESD Precautions
                   Caution: Electrostatic Discharge (ESD) is generated by two objects with different electrical
                   charges coming into contact with each other. An electrical discharge is created to neutralize this
               !   difference, which can damage electronic components and printed circuit boards.
                   The following measures are generally sufficient to neutralize this difference before contact is
                   made to protect your equipment from ESD:
                   •   Use a grounded wrist strap designed to prevent static discharge.
                   •   Keep all components and printed circuit boards (PCBs) in their antistatic bags until ready for
                       use.
                   •   Touch a grounded metal object before removing the board from the antistatic bag.
                   •   Do not let components or PCBs come into contact with your clothing, which may retain a
                       charge even if you are wearing a wrist strap.
                   •   Handle a board by its edges only; do not touch its components, peripheral chips, memory
                       modules or contacts.
                   •   When handling chips or modules, avoid touching their pins.
                   •   Put the server board and peripherals back into their antistatic bags when not in use.
                   •   For grounding purposes, make sure your computer chassis provides excellent conductivity
                       between the power supply, the case, the mounting fasteners and the server board.
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                                                                                                              Introduction
Electromagnetic Compatibility
                       Table 0-1 lists the region and compliance reference for EMC (Electromagnetic Compatibility)
                       compliance.
Table 0-1 MIS Server Platform Region and EMC Compliance References
Russia EAC
Safety Certification
                       National Recognized Testing Laboratory (NRTL) provides the safety certification for ITE
                       products. NRTL’s offer various product markings depending on the type of products being tested
                       and satisfactory tests results. Underwriters Laboratories (UL) and Canadian Standards
                       Association (CSA) are typical (NRTL’s) that provides safety certification services for Information
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Introduction
                 Technology Equipment (ITE). Table 0-2 lists the region and compliance reference for safety
                 compliance.
Table 0-2 MIS Server Platform Region and Functional Safety Listing Mark
Related Publications
                 The following documents are relevant to the MIS Platform:
                 •   SGI MIS 1.5 User’s Guide, publication number 007-5916-001
                 •   Intel Server Boards and Server Platforms Server Management Guide,
                     publication number 37830-002
                 •   Man pages (http://www.linuxmanpages.com/)
                 Various formats of SGI documentation, release notes, and man pages are available. The SGI
                 Technical Publications Library (http://docs.sgi.com/) contains the most recent and most
                 comprehensive set of online books, release notes, man pages, and other information. Refer to the
                 SGI Supportfolio™ web page for documents which access requires a support contract (as do the
                 MegaRAID books cited above). See “Product Support” on page xxi. You can also view man pages
                 by typing man <title> on a command line in Linux.
Conventions
                 The following conventions are used throughout this document:
                 Convention          Meaning
                 Command             This fixed-space font denotes literal items such as commands, files,
                                     routines, path names, signals, messages, and programming language
                                     structures.
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                                                                                                           Introduction
                  variable              The italic typeface denotes variable entries and words or concepts being
                                        defined. Italic typeface is also used for book titles.
                  []                    Brackets enclose optional portions of a command or directive line.
                  GUI element           This font denotes the names of graphical user interface (GUI) elements such
                                        as windows, screens, dialog boxes, menus, toolbars, icons, buttons, boxes,
                                        fields, and lists.
Product Support
                  SGI provides a comprehensive product support and maintenance program for its products, as
                  follows:
                       •     If you are in North America, contact the Technical Assistance Center at +1 800 800
                             4SGI (4744) or contact your authorized service provider.
                       •     If you are outside North America, contact the SGI subsidiary or authorized distributor in
                             your country. International customers can visit http://www.sgi.com/support/ Click on
                             the “Support Centers” link under the “Online Support” heading for information on how
                             to contact your nearest SGI customer support center.
CRU/FRU
                  Some of the components on the MIS Platform are customer-replaceable units (CRUs), meaning
                  that these modules were designed to be repaired/replaced by you, the customer. These include fan
                  assemblies, power supplies, storage drives, and boot drives, all of which are hot-swappable.
                  However, many of the other components on the MIS Platform should be serviced by SGI field
                  technicians ONLY, so as not to violate the warranty agreement. The components are
                  field-technician replaceable units, or FRUs. It is important to note that our CRUs can be easily
                  installed and replaced by customers, which enables a speedy recovery of proper system operation.
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Introduction
                   SGI provides several comprehensive product support and maintenance programs for its products.
                   SGI also offers services to implement and integrate Linux applications in your environment.
                   •   Refer to http://www.sgi.com/services/
                   •   If you are in North America, contact the Technical Assistance Center at
                       +1-800-800-4SGI (4744), or contact your authorized service provider.
                   •   If you are outside North America, contact the SGI subsidiary or authorized distributor in
                       your country. See http://www.sgi.com/global/index.html for more information.
Reader Comments
                   If you have comments about the technical accuracy, content, or organization of this document,
                   please contact SGI. Be sure to include the title and document number of the manual with your
                   comments. (Online, the document number is located in the front matter of the manual. In printed
                   manuals, the document number is located at the bottom of each page.)
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                                                                                                      Shipment Overview
1. Installation Guide
                  This is an installation guide for the SGI® Modular InfiniteStorage™ (MIS) Servers and JBODs.
                  This guide is for those customers who require, as a matter of security or otherwise, that they
                  perform installation and first-use of the MIS product, rather than SGI installing and performing
                  initial set-up. Please refer to the SGI® Modular InfiniteStorage™ (MIS) User Guide, version 1.5
                  for instructions for use past initial installation.
Shipment Overview
                  To reduce the chassis weight for shipping and installation, the system ships with the drives in drive
                  carriers, removed from the chassis. You will need to install the drives into the locations specified
                  on the attached labels after the chassis is installed in the rack.
                  The rail kit that ships with the system must be used to support the product. This rail kit enables the
                  system to slide forwards and backwards in the rack for service access.
The procedures required to install a system will depend on which configuration is ordered:
                  If an SGI D-rack configuration is ordered (Figure 1-1), one or more chassis ship in the rack and
                  the drives ship in separate boxes. The rail kits are already installed in the rack and on each chassis
                  and the chassis are installed in the rack. You must install the drives into the chassis in the locations
                  specified on the attached labels. Refer to “Acclimatization” on page 4 for more details.
                  If a configuration without a rack is ordered, the chassis and drives ship in separate boxes. You must
                  install the rail kit in the customer’s rack and on each chassis and then two people are required to
                  install each chassis in the rack. You must then install the drives into the locations specified on the
                  attached labels. Refer to “Installing MIS Platforms” on page 5 for more details.
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: Installation Guide
Inspecting a Shipment
                       It is important that you inspect all equipment received from a shipping carrier before signing for
                       the shipment. Be sure to do the following when you arrive at a site to install equipment and when
                       you receive equipment directly from a shipping carrier:
                       1. Inspect the shipment.
                           •   Does the number of pieces received match the bill of lading?
                           •   Have boxes been opened or is there damage to the packaging?
                       2. Open the shipment.
                           •   After removing the packaging, is there any visible damage?
                       3. Record any issues/problems (if applicable).
                           •   Use the bill of lading to record any issues discovered during the inspection.
                           •   Take photos of all visible damage.
                           •   Sign for the shipment after making notes on the bill of lading.
                       4. Report the issues to SGI.
                       Contact the Customer Support Center (CSC) at 1-800-800-4744 (in the United States; refer to
                       http://www.sgi.com/support/supportcenters.html for other local numbers) to begin the
                       replacement process.
                       Take photos of any damage and in your message, please send a brief description of the problem to
                       ships@sgi.com. A coordinator will contact you about the problem.
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                                                            Shipment Overview
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: Installation Guide
Acclimatization
                       If the equipment has been in transit for more than 24 hours to reach the install site, then a wait is
                       required, especially for HDDs. To acclimatize the shipment, wait 4 to 8 hours for the equipment
                       to acclimate to the data center environment before proceeding with the installation.
Caution: Failure to let equipment acclimate can cause condensation damage to the equipment.
Preparing to Install
                       Uncrate the rack and inspect the shipment for any damage. (Refer to “Inspecting a Shipment” on
                       page 2.)
                       Be aware that the increased weight and size of the tall racks can cause the racks to tip over if the
                       racks are improperly handled. To minimize your own personal risk of injury, use extra care and
                       allow extra time when moving racks.
                       Be sure to evaluate the path you will be moving a rack along before moving the rack. Plan the
                       move by anticipating any issues and removing any obstacles. Use extra caution during the actual
                       move and roll the rack on to the data center floor.
Required Tools
                       The following tools are required:
                       •   #1 and #2 Phillips screwdrivers,
                       •   Long #2 Phillips screwdriver,
                       •   Flat-head screwdriver,
                       •   Thin-tipped flat-head screwdriver
                       •   10mm hexagonal socket wrench,
                       •   A wheeled cart with breaks, sturdy enough to hold the chassis, and on which to work.
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                                                                                                   Installing MIS Platforms
                      The MIS Chassis ships with the front grille unattached. There are two or three cables (one or two
                      for control panel functionality, and one for the S9D network interface) at the the front left corner
                      of the chassis (Figure 1-3). These cables must be attached to their corresponding sockets on the
                      front bezel grille, before attaching the grille to the chassis. To do so, follow these instructions.
007-5924-004                                                                                                                 5
: Installation Guide
                       1.   Orient the front bezel grille so that the left inner edge containing the sockets (Figure 1-2)
                            lines up with the front left edge of the chassis where the cables protrude.
                       2. Use the two latches on the bezel grille to help attach it to the chassis on the left side, and
                          work from the right side (swinging it open like a door, rather than top or bottom, for ease of
                          cabling).
Figure 1-2 Front Bezel Grille Control Panel Sockets and S9D Network Interface
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                                                                                         Installing MIS Platforms
3. Plug the ribbon cable(s) into their corresponding control panel socket (Figure 1-4).
4. Plug the network cable into the underside of the S9D network interface (Figure 1-5s).
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: Installation Guide
                       5. Once all the wires have been successfully connected, swing the grille shut such that it can be
                          snapped into place on the front of the chassis using the attached tabs (Figure 1-6). Push
                          firmly but gently to attach the front grille.
D-Rack Stiffener*
                       Note: The following procedure is for installing into a D-Rack already on location, where the
                       customer is required install the outer rails into the SGI D-Rack. These instructions are for
                       SGI D-Racks on location ONLY. SGI D-Racks shipped with chassis will come
                       pre-installed with rolling rails and D-Rack Stiffener.
                       If you are installing rails into a SGI D-Rack on location, it will require installation of the D-Rack
                       Stiffener . This item is two brackets: the attachment plate with a wedge-shaped cut-out
                       (Figure 1-7), and the adjustment plate with interlocking tabs (Figure 1-8).
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                                                                                        Installing MIS Platforms
               These two pieces come together to form a single unit, held together by two vertical 6x16 metric
               hex flange bolts (Figure 1-9, in cyan) to make the D-Rack Stiffener, and attached to the D-Rack
               using four bolts (Figure 1-9, in magenta).
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: Installation Guide
                       1.   Due to their construction, it is easiest to join the brackets together first, and then attach the
                            D-Rack Stiffener to the D-Rack.
                       2. Attach the inner bracket to the outer bracket using the vertical bolt and socket wrench
                          (Figure 1-9). Do not tighten these bolts all the way. They will be used later for altering rail
                          aligning using the alignment tool.
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                                                                                              Installing the Rolling Rails
Note: The screws that attach the D-Rack Stiffener to the rack can be tightened all the way.
                  3. Attach the the D-Rack Stiffener to the D-Rack using the four support screws. There are six
                     holes available for the screws, but two will be blocked. Use the remaining four holes
                     (Figure 1-9).
                  Note: When installing, leave the vertical bolts of the D-Rack Stiffener loose. The vertical bolts in
                  the D-Rack Stiffener will allow the rails to be adjusted later using the alignment tool.
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Shipping Tabs
                       The MIS rolling rails are shipped with safety shipping tabs to keep the rails from rolling out during
                       shipping. These tabs will need to be removed prior to removing the inner rolling rail from the outer
                       rail.
                       1.    Remove the screw holding the safety tab in place using a phillips screwdriver.
                       2. Remove the shipping tab from the rails.
                       The rails can now be separated. Keep the tabs and screws in a safe place for possible future use
                       (shipping the unit to another location).
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                                                                                                  Installing the Rolling Rails
                     Warning: These steps must be taken or the wheels of the inner rail can get
               !     bound to the outer rail, causing the chassis to get stuck.
                     1.    Tighten the screws on the left rail completely: middle bolts first (for D-racks), then the front
                           screws, and lastly, the rear.
                     2. Using the included alignment tool (Figure 1-13), insert it into the rails so that it rests on the
                        inner track of the outer rails, just as a chassis would.
                     3. Adjust the right rail until it is flush with the alignment tool and the left rail. Insure that the
                        tool can be slid smoothly from the front to rear of the rack. (This step is also best
                        accomplished with two people, as shown in Figure 1-14.)
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                       4. Tighten the screws on the right rail in order of front then back, leaving the middle bolts last
                          (for D-racks), so as to keep as straight an alignment as possible.
                       5. Double-check the alignment by moving the alignment tool through the rack. There should be
                          no play between the alignment tool and the rails. (Figure 1-15)
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                                                                                                  Installing the Rolling Rails
                      Note: Some air ducts use a Velcro strip in place of a second screw. If this is the case, place the
                      hook side of the Velcro on the air duct tab, and the fuzzy size of the Velcro on the outside of the
                      outer rail.
Note: The word “Front” will be upside-down on one side of the chassis (Figure 1-17).
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2. Locate the six support tabs along the side of the chassis (Figure 1-18).
                       3. Slide the rolling rail beneath the support tabs on the side of the chassis until it locks firmly
                          into place (Figure 1-19).
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                                                                                       Installing the Rolling Rails
               4. Using the included screws, attach the rolling rail to the chassis. Make sure the screw heads
                  are counter-sunk, so as not to catch on anything when rolling in the rack.
               5. You may have to move aside a safety latch in order to install some rolling rail screws. Be
                  sure to set the safety latches back to their home positions after rolling rail installation
                  (Figure 1-20).
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                       Caution: Make sure that only one person moves the chassis in the rack at any given time. It is
                       possible to get your fingers caught in the latches on either end if, while you’re trying to push the
                       chassis back into a locked position, someone else accidently pulls from the other side. This can
                       trap your finger between the metal edges of the rail mount and the rack (potentially resulting in
                       injury). For more precautions, please see “Safety Precautions” on page xvii.
18                                                                                                             007-5924-004
                                                                                 Removing the Front or Rear Chassis Cover
                  Important: When a chassis cover is removed while an MIS system is powered on, an intrusion
                  sensor monitored by the BMC will detect its removal. If the cover is off for more than 15 minutes
                  or any system temperature sensor exceeds its threshold limit, the server will perform an orderly
                  shutdown and power-off.
                  As shown in Figure 1-21, the top of the chassis is bifurcated; that is, there is a front and rear chassis
                  cover. Except for power supply maintenance, all service actions require that you remove the front
                  or rear chassis cover, detailed below.
                  1.    Remove the single security screw from the cover.
                  2. Push the detent, and slide the cover out and up from the chassis.
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                       in drive carriers before being installed into the StorBricks. To install a hard drive into the hard
                       drive carrier, perform the following steps.
                       1.   Locate the drives for StorBricks 0-4 and order them on a cart according to the labels on the
                            drive carriers.
                       2. Pull the chassis from the front of the rack (see “Sliding the Chassis Forward/Backwards” on
                          page 18).
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                                                                             Installing the Drives
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                       3. Remove the front chassis cover by first removing its safety screw , then by pressing the top
                          cover button and lifting the cover from the chassis (see “Removing the Front or Rear Chassis
                          Cover” on page 19).
                       4. Place the corresponding drive into its drive slot (a system layout diagram, Figure 1-23, is
                          also provided on the inside of one of the top chassis covers). Press the drive firmly into the
                          StorBrick. You will know the drive is in place when the latch on the top of the drive carrier
                          snaps into place.
                       5. When all drives are in their correct slots, place the top cover on the chassis and secure it with
                          its safety screw .
                       6. Move the chassis to the stowed position in the rack.
                       7. From the rear of the rack, move the chassis out backwards and repeat the above steps for the
                          rear of the chassis (StorBricks 5-7 for a server, and 5-8 for a JBOD).
                       Warning: Boot Drives CM0-0 & CM0-1 are installed in single server ONLY. Be sure to
                       install them into the correct drive slots. Installing the boot drives in the wrong slot requires
                       a complete reinstall of the operating oystem once returned to the correct slots.
                       Boot Drives CM0-0, CM0-1, CM1-0, & CM1-1 are all installed in dual sever.
                       The follow are a few suggestions for cable configurations given a single or dual chassis
                       configuration, and a variety of JBODs. This is by no means a complete list, nor is it the only
                       way to configure connections. Using T10-based zoning, there is the option to split the drives
                       across the four HD miniSAS ports (Figure 1-25). Phy-based zoning is used when there is more
                       than one JBOD I/O module present, and drives may be split between the two I/O modules.
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                                                                               Cable Guide & Chassis Location
               JBODs connect to the MIS Server using an external HBA. JBODs require the presence of an
               external HBA to connect to the MIS Server. Each HBA can support up to two JBODs, each server
               can support up to two JBOD HBAs, for a maximum of four JBODs per server.
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Figure 1-27 Cable Guide – Single Server with two JBODs Shared
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                                                                                 Cable Guide & Chassis Location
Figure 1-28 Cable Guide – Single Server with two JBODs daisy-chained
Figure 1-29 Cable Guide – Single Server with two HBAs, 2 JBODs with Dual I/O
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Figure 1-30 Cable Guide – Single Server with 2 HBAs, 2 JBODs with Dual I/O, split
Figure 1-31 Cable Guide – Single Server with 2 HBAs, 2 JBODs with Dual I/O, shared
26                                                                                                           007-5924-004
                                                                                  Cable Guide & Chassis Location
Figure 1-32 Cable Guide – Single Server with four JBODs daisy-chained
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Figure 1-33 Cable Guide – Single Server, Dual HBA, four JBODs
28                                                                                       007-5924-004
                                                                                 Cable Guide & Chassis Location
Figure 1-34 Cable Guide – Single Server, Dual HBAs, four JBODs daisy-chained
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Figure 1-35 Cable Guide – Single Server, Dual HBAs, four JBODs with Dual I/O, split daisy-chain
30                                                                                                          007-5924-004
                                                                                  Cable Guide & Chassis Location
Figure 1-36 Cable Guide – Single Server with Dual HBAs, 4 JBODs with Dual I/O split-share
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Figure 1-38 Cable Guide – Dual Server with two JBOD shared
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                                                                         Cable Guide & Chassis Location
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Figure 1-40 Cabling Guide – Dual Server with four JBOD split
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                                                                                    Cable Guide & Chassis Location
Figure 1-41 Cable Guide – Dual Server with 2 JBODs with Dual I/O
Figure 1-42 Cable Guide – Dual Server with 2 shared JBODs with Dual I/O
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36                                                                                                           007-5924-004
                                                                                                 Cable Management Arm
                   Removing segments from the cable management arm is done using a thin flat-head screwdriver.
                   •   For a 26" deep rack, do not remove any sections.
                   •   For a 30" deep rack, remove 3 sections of the arm.
                   •   For a 34" deep rack, remove 6 sections of the arm.
                   There are two ways that segments can be removed: either while the cable management arm is not
                   attached to the chassis or rack, and devoid of cables, or while attached to the rack and chassis, full
                   of cables.
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                       For the first method, segments are removed from the end of the arm. Use the flat-head screwdriver
                       and slip it between the plastic pieces that form the joint of the arm (Figure 1-45).
                       Pry the joint open using the thin blade of the screwdriver by wedging it between the plastic parts
                       that make up the joint and twisting the screwdriver until the outer plastic piece pops off of the inner
                       plastic tab (Figure 1-46).
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                                                                                     Cable Management Arm
               The segments are now removed from the end of the arm (Figure 1-47), and the arm can now be
               attached to the chassis and rack (Figure 1-48).
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                        The second way to shorten the cable management arm is while it is already installed on the rack,
                        with cables in it. In this case, the segments are removed from the middle of the cable management
                        arm (Figure 1-49).
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                                                                                            Cable Management Arm
               Pry the joint of a segment open by using the thin blade of a flat-head screwdriver by wedging it
               between the plastic parts that make up the joint and twist the screwdriver until the outer plastic
               piece pops off of the inner plastic tab (Figure 1-50).
               Repeat for the joint on the other side, then pull the arm apart by sliding it down the cables
               (Figure 1-51).
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                       Pry apart the segment joint on the other end of the section you wish to remove (Figure 1-52), until
                       the number of unwanted segments have been separated from the rest of the cable arm.
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                                                                                         Cable Management Arm
               Once complete, separate the section of unwanted segments from the cables by twisting the section
               off (Figure 1-53).
               Bring the two spliced ends of the cable management arm together, and snap the joint together
               (Figure 1-54).
Figure 1-54 Join the Spliced Ends of the Cable Management Arm
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The cable arm should now be the appropriate length for the depth of the rack.
                       To install the cable management arm, first extend the chassis out the rear of the rack (“Sliding the
                       Chassis Forward/Backwards” on page 18). Next, lie the cable management arm on a table with the
                       open side up. Lay the cables to be attached to the chassis on top, and starting at one end, press the
                       cables into the arm until they snap inside. Continue to press the cables down the length of the arm
                       until they are all inside. Once complete, slide the arm down the cables until there is enough length
                       to allow the arm to be bolted into place on the Cable Arm Bracket (Figure 1-44 on page 37) .
                       Using the attached bolts, fasten the Cable Management Arm Plate to the Cable Arm Bracket.
                       Then, wrap the arm around itself (as in Figure 1-44). Next, slide the chassis out the front of the
                       rack to be able to access the rack mount EIA side rails. Attach the end arm plate to the EIA rail
                       using the provided screws and nuts. Return the chassis to the stored position in the rack.
                       The cables can now be connected to their corresponding inputs (power, networking). Once cabling
                       is complete, use the provided velcro strips to wrap the cords and hold them tight (Figure 1-55).
44                                                                                                           007-5924-004
                                                                                                   Turning the Power On
                  If the machine is powering on and there is a fault (e.g., the machine was in the middle of a rebuild
                  when the power was cut, a degraded RAID set is in the system, battery is exhausted, etc.), these
                  warnings will appear during start-up.
                  If the platform is an MIS dual-server and both servers are powered down, performing the above
                  steps powers on the server with which you are working, the drives, and the fans. The second server
                  will remain powered off until it is powered on, then all power will be turned on.
                  For a JBOD Unit, the power button on the front panel will turn on the power to that I/O module,
                  the fans and the drives. If a second module is installed and powered off, it will remain off until it,
                  too, is powered on.
Troubleshooting
                  This section describes troubleshooting for the problems listed below, many which customers are
                  able to perform without the assistance of SGI Field Technicians. In SGI’s Modular Infinite Storage
                  (MIS) User Guide (publication series 007-5818-00x and 007-5916-00x), Chapter 2, “System
                  Interfaces‚” describes use of the control panel to monitor the overall system status and the status
                  of specific components.
                  •   “No Video” on page 46
                  •   “Losing the System’s Setup Configuration” on page 46
                  •   ““Missing” Firmware Files” on page 46
                  •   ““Missing” Firmware Files” on page 46
                  •   “Cannot Receive Email Alerts Using BMC” on page 47
                  •   “Intel BIOS POST error messages and handling description” on page 49
                  •   “Beep Codes” on page 53
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                       Other troubleshooting information is contained in SGI Modular InfiniteStorage (MIS) User Guide,
                       “Related Publications” on page xxv (such as, Intel® Remote Management Module 4 and
                       Integrated BMC Web Console User Guide ). For help beyond what is mentioned in this document,
                       see “Product Support” on page xxi.
No Video
                       If the power is on but there is no video, remove all add-on cables (besides power & video). Use a
                       different monitor to determine if the fault lies with it. Use the speaker to determine if any beep
                       codes exist. Refer to “Beep Codes” on page 53 for details.
                       Make sure there is no fault with the power supplies. A fault with the power supply may cause the
                       system to lose the CMOS setup information. If this does not fix the Setup Configuration problem,
                       contact SGI for repairs.
                       There may come a time when you will need to update the zoning tool in order to support the
                       firmware that is present on the StorBricks in a new MIS Server or JBOD machine. If this is the
                       case, you will receive an error message that states either: Unable to find directory that contains
                       firmware files or Unable to find firmware file, and below that, the version number of the
                       firmware files necessary (example: 01.30.00.00).
46                                                                                                         007-5924-004
                                                                                                    Troubleshooting
                   The firmware folders necessary for download will contain the version number in the folder name.
                   So for this example, the desired firmware folders will have a name similar to
                   storbrick-release-01.30.00.00 <date>.
                   You will need to download the necessary firmware files and place them into the
                   /opt/Zones/Versions folder for Linux and the c:\Program Files
                   (x86)\Zones\Versions folder for Windows.
                   In order to receive email alerts, the MIS Server must be networked to a SMTP mail server. Next,
                   using the BMC, go to the Configuration page, and click on Alert Email (Figure 1-56).
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                       The LAN Channel should be set to Baseboard Mgmt. The SMTP Server IP should be the IP
                       address of the mail server to which the MIS Platform is connected. Sender Address can be any
                       email address configured on the STMP server. Local Hostname can be any name to identify the
                       machine sending the alert (limit of 18 characters). When finished, click the Save button at the
                       bottom of the page. A pop-up will let you know that the changes have been saved (Figure 1-57).
48                                                                                                      007-5924-004
                                                                                                       Troubleshooting
                    Make sure all the checkboxes for alerts contain a check for each alert to be sent. The LAN
                    Channel to Configure should be set to Baseboard Mgmt. Alert Destination #1 should be set to
                    Email, and Send Email to: should be the email address of the account to receive the alerts. When
                    finished, click the Save button at the bottom of the page. A pop-up will let you know that the
                    changes have been saved. To test your configuration, click the Send Test Alerts button. You will
                    receive a pop-up letting you know that the email was sent, and you will receive an email notifying
                    you of a successful test (Figure 1-59).
                    Refer to this table if you receive a code during the POST of booting my Intel® Server Board. What
                    does it mean?
See table for listing of codes for BIOS events relevant to Intel® Server Boards.
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50                                                                                                      007-5924-004
                                                                                            Troubleshooting
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: Installation Guide
                       8601         Override jumper set to force boot from lower alternate   Minor
                                    BIOS bank of flash ROM
52                                                                                                             007-5924-004
                                                                                                         Troubleshooting
Beep Codes
               The BMC may generate beep codes upon detection of failure conditions. Beep codes are sounded
               each time the problem is discovered (for example, on each power-up attempt), but are not sounded
               continuously. Common supported codes are listed in Table 1-2.
               In Table 1-2, each digit in the code is represented by a sequence of beeps whose count is equal to
               the digit.
                                                                           Associated
               Beep Code       Reason for Beep                             Sensors                 Supported
               1-5-2-1         No CPUs installed or first CPU socket is    CPU Missing sensor      Yes
                               empty.
               1-5-4-4         Power control fault (power good assertion   Power unit—soft         Yes
                               time-out).                                  power control failure
                                                                           offset.
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                       Another source of beep codes may be the LSI MegaRAID card. Table 1-3 contains a summary of
                       the LSI MegaRAID card beep codes. These beep codes indicate activity and changes from the
                       optimal state of your RAID array.
                       Intel boards and systems are designed to indicate USB readiness by a series of beep codes during
                       POST, before video becomes available. These beeps mean USB is powered and initialized.
                       Device such as a pen drives or USB CD/DVD ROM drives attached to external USB port will
                       generate a beep once the device is recognized, powered and initialized.
                       These beep codes do not signal any error. They signal USB and external device readiness during
                       POST.
                       Is at least one power supply fan spinning? If it is yes, there is good power to the modules. Verify
                       all required power cables are correctly plugged into the power supply modules.
54                                                                                                          007-5924-004
                                                                                                         Troubleshooting
                     If it is no, there is potential lack of clean power to the module. Swap power cable. Try different
                     wall circuit or replace a power supply module (see “Replacing a Power Supply” on page 58).
Fans spin when power button is pressed, but no video display is seen
                     Are there any beeps? If yes, beep codes are listed in Table 1-3 on page 54. If the answer is no,
                     there may be a memory card error, processor error, or misplacement of the boot drives in the
                     chassis.
                     Ensure the boot drives are in the correct location (Figure 1-23). ONLY Boot Drives CM0-0 &
                     CM0-1 are installed in single server. Boot Drives CM0-0, CM0-1, CM1-0, & CM1-1 are ALL
                     installed in dual sever.
                     For memory and processor errors, contact SGI Technical Support (see “Product Support” on
                     page xxi).
                     This may be a problem with add-in cards in the server system. Contact SGI Technical Support (see
                     “Product Support” on page xxi).
                     This may be a problem with add-in cards in the server system. Contact SGI Technical Support (see
                     “Product Support” on page xxi).
                     Use operating system logging utility such as Windows Event Viewer or Linux dmesg to narrow
                     the source of the error, and contact SGI Technical Support (see “Product Support” on page xxi).
                     If you recently installed new software or new device drivers, try booting into Safe Mode and
                     uninstall the new software or driver. If you can now boot normally, there may be a compatibility
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                       issue between the new software or driver and some component in your system. Contact the
                       software manufacturer for assistance.
                       Certain changes in BIOS settings (such as chipset timing or latency, memory timing or latency,
                       processor clock frequency, etc.) can cause a system to no longer boot. If you are able to enter the
                       BIOS Setup by pressing F2, reset the BIOS to factory defaults by pressing F9. Save and exit the
                       BIOS Setup. If you cannot enter the BIOS Setup, contact SGI Technical Support (see “Product
                       Support” on page xxi).
                       If the platform gets stuck in a cycle where it is continuously rebooting without ever going into full
                       power on, try replacing two of the power supplies, even if they are not reporting faults.
                       If a power supply has failed and does not correctly issue its fault (i.e., it falsely reports that it is
                       still working), it will cause the platform to go into standby power mode, and the platform will try
                       rebooting in order to power up. This can cause the platform to get stuck in a reboot cycle, and
                       never actually successfully powering on. Replacing the faulty power supplies resolves this issue.
System Maintenance
                       For warranty and safety considerations, SGI designates the following chassis components as
                       customer-replaceable units (CRUs):
                       •   Power supplies
                       •   Fans
                       •   Disk drives
                       These components are all hot-swappable; that is, you can replace them without powering down
                       the platform. A trained service technician should install and replace all other components. This
                       chapter describes how you replace the CRUs:
                       •   “Detecting Component Failures” on page 57
                       •   “Replacing a Power Supply” on page 58
56                                                                                                              007-5924-004
                                                                                         Detecting Component Failures
A common maintenance “first step” is, “Removing the Front or Rear Chassis Cover” on page 19
                   Warning: Review the warnings and precautions listed in, “Important Information” on
               !   page xv, before setting up or servicing this chassis.
                   Some component failures are also registered on the Fan Base Service Page. The Fan Base Service
                   Page can be accessed by connecting through the MIS-S9D Proprietary Ethernet port (Figure 1-60)
                   and pointing a browser to the fan base IP: 10.4.3.196/service.xml for servers
                   (Figure 1-62) and 10.4.3.214/service.xml for JBODs. Using the Fan Base Service Page,
                   failed fans can be set in a “Safe to Service” mode, a step necessary before changing out a fan
                   module.
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                       Pwer supplies are only hot-swappable if the redundant power option (total of 4 power supplies) is
                       installed. If the platform has only 2 power supplies, the system will need to be powered down
                       before replacing a faulted power supply. To replace a failed power supply, take the following steps:
                       1.   Using the BMC Web Interface, verify the fault (failed unit) and turn on the locator LED
                            (blue) for that chassis.
                       2. Locate the failed unit in the specified chassis: its amber service LED should be lit, indicating
                          a fault (see Figure 1-61).
                       3. Unplug the power supply that will be replaced and remove its power cord.
                       4. Push the release tab on the back of the power supply.
                       5. Pull the power supply out using the handle.
                       6. Replace the failed power module with another of the same model.
                       7. Push the new power supply module into the power bay until it clicks into the locked position.
                       8. Plug the AC power cord back into the module, and plug the module in.
                       9. If the power supply is being hot-swapped on a system that is already powered on, the power
                          supply will power up automatically. If the power supply is being installed in a system that is
                          not powered on, the system should be powered on at this time.
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                                                                                           Detecting Component Failures
                   10. You will have to wait a few moments for the power supply to respond to AC power, and
                       complete its internal processes, before its status LEDs are illuminated. Once lit, ensure that it
                       is also recognized as Good in the BMC.
                   Warning: If the fan is NOT set in a “Safe to Service” mode, there are only 10 seconds
                   available to exchange a fan. Without setting “Safe to Service,” the platform will assume a
                   fan has experienced critical failure, requiring an emergency shutdown for thermal
                   requirements. Setting “Safe to Service” allows more time for replacement procedures (15
                   minutes) before initiating thermal shutdown.
                   1.    Using the BMC Web Interface, verify the fault (failed module) and turn on the locator LED
                         (blue) for that chassis.
                   2. Locate that chassis and use an Ethernet cable to connect a server/laptop to the MIS-S9D
                      Proprietary Network Interface (Figure 1-60).
                   3. Access the Fan Base Service Page by pointing a browser to
                      http://192.168.0.196/service.xml (for servers) or
                      http://192.168.0.214/service.xml (for JBODs) from the connected
                      server/laptop. This will bring up the Fan Base Service Page (Figure 1-62).
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                       4. From the Fan Base Service Page, locate the faulted fan, and click the Off button.
                       5. At the prompt, Are you sure you want to turn OFF FAN #? (where # is the number of the
                          fan), click Ok. This put the fan in a “Safe to Service” mode and will illuminate its blue
                          locator LED.
                       6. Remove the front chassis cover (see “Removing the Front or Rear Chassis Cover” on
                          page 19) and locate the fan module with the illuminated blue LED (Figure 1-63).
                       7. Loosen the thumbscrew, pull out the faulted fan by pulling upward on both the front and rear
                          flanges, and replace it.
                       8. Once the fan module is replaced, seat the fan by pushing between the two LEDs until it seats.
                       9. Re-install the chassis cover and security screw.
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                                                                                         Detecting Component Failures
                    10. Using the fan base Service page, return the fan to On/Full Power. At the prompt, Are you
                        sure you want to turn ON FAN #? (where # is the number of the fan), click Ok. If there are
                        no faults, the fan will power up, report status of Good, and its green LED will be lit. This
                        will also turn off the blue locator LED.
                    11. Unlock the chassis from the extended position and push it back until it locks into the stowed
                        position.
                    12. Using the BMC, clear the chassis locator LED.
                    Important: Empty drive carriers cannot be inserted into the StorBricks, so slots without HDDs
               !    will not have carriers.
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                       1.   Using the MegaRAID Storage Manager for your system, verify the fault (failed unit).
                       2. Using the MegaRAID Storage Manager, set the system to a service state for the removal of
                          the faulted drive. The MegaRAID Storage Manager will turn off the drive. It will then turn
                          on the fault LED (yellow) for that drive.
                       3. Remove the chassis cover. (See “Removing the Front or Rear Chassis Cover” on page 19.)
                       4. Locate the faulted drive with the illuminated blue LED and remove it from its StorBrick (or
                          boot drive bay). (See “Removing the Drive” on page 62.)
                       5. Replace the faulted drive. (See “Installing the Drives” on page 19.)
                       6. Once the drive is replaced, re-install the chassis cover and security screw.
                       7. Unlock the chassis from the extended position and push it back until it locks into the stowed
                          position.
                       8. Using the MegaRAID Storage Manager, return the system to a normal state. The new drive
                          will be powered on.
                       9. If there are no faults at this time, the rebuild or mirroring of the data to the new drive will
                          begin.
                       As shown in Figure 1-22, the drives are mounted in drive carriers to simplify their installation and
                       removal from the drive bricks or boot drive bays in the chassis.
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                                                                                                  Detecting Component Failures
                          To re-install a hard drive into the hard drive carrier, perform the following steps:
                          1.   Place the hard drive carrier on a flat, stable surface such as a desk, table, or work bench.
                          2. Slide the hard drive into the carrier with the printed circuit board side facing down.
                          3. Carefully align the mounting holes in the hard drive and the carrier.
                               Make sure the bottom of the hard drive and bottom of the hard drive carrier are flush.
                          4. Secure the hard drive using the four screws (see Figure 1-64).
                          5. Replace the drive carrier into the chassis.
                          6. Push the drive carrier down to lock it place.
                          7. Replace the chassis cover and slide the chassis back into place in the rack.
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: Installation Guide
                       8. Using the MegaRAID Storage Manager (see SGI Modular InfiniteStorage (MIS) User
                          Guide, or SGI Modular InfiniteStorage (MIS) User Guide, version 1.5, Chapter 3, “System
                          Software‚”), and add the drive to the system zoning configuration. Once properly zoned, the
                          drive will begin the rebuild process.
Safe Power-Off
                       There are different ways to shut down an MIS machine, each more extreme than the next. The
                       most polite way is to go into the machine’s operating system and select Shut Down. This will
                       prompt the user to enter a password before allowing the shut-down process. They include,
                           •    Using the OS GUI power-off button at the console screen, if a keyboard/mouse/video
                                monitor is connected.
                           •    When logged in via an ssh session and executing a “shutdown” or “poweroff”
                                command.
                           •    When logged in to the BMC and using the power control page to power off the sever.
                           •    Using the remote console screen GUI power-off button, if a KVM RMM4Lite session is
                                established through the BMC.
                           •    Connecting to the fan base using the MIS-S9D proprietary network interface and
                                executing a “shutdown” or “poweroff” command.
                       If the platform is an MIS dual-server and both servers are powered up, performing the above steps
                       powers off the server with which you are working. The fans, drives and second server will remain
                       powered on until the second server is powered off, then all power (but standby) will be turned off.
                       For a JBOD Unit, the power button on the front panel will turn off the power to that I/O module.
                       If a second module is installed and powered on, it, the fans and the drives will remain on until it,
                       too, is powered off.
                       The next way shut down the platform is to hold down the Power button on the front of the unit
                       until the machine powers off. However, this is not a polite way to power off the machine, and will
                       require a recovery process at start-up.
                       If power is lost from outside the machine (power outage), the machine will recognize the loss of
                       power and execute an emergency shutdown procedure. If there is a battery back-up unit installed,
                       it will protect integrity of cache in the event of power or server failure.
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