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Disk Defragmentation

Disk fragmentation occurs when the file system cannot allocate enough contiguous space for files, leading to performance loss. Defragmentation is a maintenance process that reorganizes file storage to reduce fragmentation and create larger free space. This process is particularly beneficial for frequently modified files and helps improve overall system efficiency.

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11 views6 pages

Disk Defragmentation

Disk fragmentation occurs when the file system cannot allocate enough contiguous space for files, leading to performance loss. Defragmentation is a maintenance process that reorganizes file storage to reduce fragmentation and create larger free space. This process is particularly beneficial for frequently modified files and helps improve overall system efficiency.

Uploaded by

charulata.hi
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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B I U

Disk
Defragmentation
Page 4

WHAT ARE THE


CAUSES OF FILES
TO BE
FRAGMENTED IN
THE FIRST PLACE?
Page 5

FRAGMENTATION OCCURS WHEN THE FILE SYSTEM CANNOT OR WILL


NOT ALLOCATE ENOUGH CONTIGUOUS SPACE TO STORE A COMPLETE
FILE AS A UNIT, BUT INSTEAD PUTS PARTS OF IT IN GAPS BETWEEN
EXISTING FILES (USUALLY THOSE GAPS EXIST BECAUSE THEY
FORMERLY HELD A FILE THAT THE FILE SYSTEM HAS SUBSEQUENTLY
DELETED OR BECAUSE THE FILE SYSTEM ALLOCATED EXCESS SPACE
FOR THE FILE IN THE FIRST PLACE). FILES THAT ARE OFTEN
APPENDED TO (AS WITH LOG FILES) AS WELL AS THE FREQUENT
ADDING AND DELETING OF FILES (AS WITH EMAILS AND WEB
BROWSER CACHE), LARGER FILES (AS WITH VIDEOS) AND GREATER
NUMBERS OF FILES CONTRIBUTE TO FRAGMENTATION AND
CONSEQUENT PERFORMANCE LOSS. DEFRAGMENTATION ATTEMPTS
TO ALLEVIATE THESE PROBLEMS.
So, what is Disk
Defragmentation?
Page 3

n the maintenance of file systems,


defragmentation is a process that reduces the
degree of fragmentation. It does this by
physically organizing the contents of the mass
storage device used to store files into the
smallest number of contiguous regions
(fragments, extents). It also attempts to
create larger regions of free space using
compaction to impede the return of
fragmentation. Some defragmentation utilities
try to keep smaller files within a single
directory together, as they are often accessed
in sequence.
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