Disk Fragmentation

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Contents

•What is Disk Fragmentation• Solution For Disk Fragmentation •Key features of NTFS•Comparing Between NTFS and FAT

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What is Disk Fragmentation

• A disk in which files are divided into pieces scattered around the disk.• Occurs when you use a disk frequently, due to

creating, deleting and modifying.• It required the hard drive to locate for all the

fragments of a file.• Cause file access to take a longer time to collect

the file fragments from a few places instead of just one.

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• Data that are generate cannot fit where it is currently store will be store elsewhere in your data file.• When expanding the database on a drive it is not

guaranteed that the disk space allocated to it will be contiguous to the existing data file allocation.• Fragmentation causes slow down because many

files consist of multiple fragments.

4FILE1FILE2FILE1

Example of fragmented file.File1 is stored in two locations which are not contiguous.

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Solution For Disk Fragmentation • Defragmentation is a solution for fragmented

file.• Disk Defragmenter is an application that

reorganizes the data and partitions the files.• Defragmenter will search your hard drive and

move data from one location to another location• Frees up disk space and speeds up your

computer.

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File that is not fragmented

Key Features Of NTFS

• Secure file system for Windows 7, Vista and XP • Encryption and compression of files and

folders.• Larger drive and file support.• Limit the amount of space a user is

allowed to use

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Comparing Between NTFS and FAT

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FAT32 (File Allocation Table) NTFS (New technology File System)

No security and recoverability. No file compression.

Built in security and recoverability.Support file compression.

Maximum volume size is 32GB for all OS and 2TB for some OS.

Maximum volume size is 2TB.Cannot be used on floppy disk.

Widely used computer file system and on memory cards.Does not support domains.Support average disk space economy and minimal fault tolerance.

File system that windows NT and later version of OS uses for storing and retrieving files on hard disk.Support max disk space economy and fault tolerance

Referencing • http://blogs.technet.com/b/askperf/archive/2008/03/14/disk-

fragmentation-and-system-performance.aspx• http://technet.microsoft.com/en-us/library/

cc737029(WS.10).aspx• http://technet.microsoft.com/en-us/library/

cc779002(WS.10).aspx

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