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Storage Devices

The document provides an overview of various data storage devices, including hard disks (internal and external), magnetic tapes, floppy disks, optical media devices (CDs, DVDs, Blu-ray), and solid state media devices. It highlights the characteristics, capacities, and obsolescence status of each type. Solid state devices are noted for their high-speed electronic data handling and lack of moving parts.

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13 views2 pages

Storage Devices

The document provides an overview of various data storage devices, including hard disks (internal and external), magnetic tapes, floppy disks, optical media devices (CDs, DVDs, Blu-ray), and solid state media devices. It highlights the characteristics, capacities, and obsolescence status of each type. Solid state devices are noted for their high-speed electronic data handling and lack of moving parts.

Uploaded by

mariyamshadha2
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Hard Disk:

• Consists of a magnetised platter and a moving metal head.

• Types: Internal hard disks and external hard disks.

• Internal Hard Disk: Stores large amounts of data permanently in the system unit;
magnetic media device.

• External Hard Disk (Portable): Portable storage device.

• Capacities: Available in various capacities, e.g., 500 GB, 1 TB, 2 TB


Magnetic Tapes:

• Composition: Thin plastic tape covered with a magnetic substance.


• Purpose: Used for recording sounds, images, or computer data.

• Status: Obsolete (was used often in the past).

Floppy Disk:

• Type: Magnetic media device.

• Purpose: Stores small files; external storage device for carrying data.
• Capacity: Typically 1.44 MB.

• Status: Becoming obsolete.

• Related Technologies (from the past):

o Zip Disks: Produced using similar technology as floppy disks. Capacity: 250 MB.
Not used often.

o Jazz Disks: Produced using similar technology as floppy disks. Capacity: 2 GB.
Not used often.

Optical Media Devices:

• Functionality: Data is read and written using laser beams.

• Characteristic: All types are portable.

CD - Compact Disks:

• Types:
o CD-R (recordable): Data can be written once.
o CD-RW (rewritable): Data can be written multiple times.
• Capacities: 650 MB and 700 MB.

Digital Versatile Disks (DVD):

• Types:

o DVD-R (recordable): Data can be written once.


o DVD-RW (rewritable): Data can be written multiple times.

• Capacities: 4.7 GB, 8.5 GB, 15 GB, and 30 GB.

Blue Ray Disks:

• Capacity: Data can be stored on several levels, with each level holding 25 GB.

Solid State Media Devices:

• Functionality: Write and read data electronically at high speed.


• Key Feature: No moving parts (unlike hard disks and compact disks). This is why they
are called "solid state."
• Examples:
o Solid State Drive (SSD drive)
o Pen Drive
o Memory Card

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