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Disk Fragmentation

yates avatar
yates
11 diapositives · 476 Views · Jul 19, 2014

Disk Fragmentation. Refers to the condition of a disk in which files are divided into pieces scattered around the disk. Occurs naturally when frequently modifying, creating or deleting files. Results in slow data access speed . Problems. Increases system boot-up time

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Disk Fragmentation
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  1. Disk Fragmentation • Refers to the condition of a disk in which files are divided into pieces scattered around the disk. • Occurs naturally when frequently modifying, creating or deleting files. • Results in slow data access speed

  2. Problems • Increases system boot-up time • Increases response time of applications or programs • Increases time during installation of software • Worsens delay of system response time or user input

  3. FAT (File Allocation Table) • A table that the operating system uses to locate files on a disk. Due to fragmentation, a file may be divided into many sections that are scattered around the disk. The FAT keeps track of all these pieces. • Versions of the FAT format • FAT12 • FAT16 • FAT32

  4. NTFS • NTFS is the standard file system of Windows NT, including Windows 2000, Windows XP, and all their successors to date. • NTFS supersedes the FAT file system as the preferred file system for Microsoft’s Windows operating systems, NTFS has several improvements over FAT.

  5. New Technology File System (NTFS) High-reliability Security and Access Control Braking Size Barriers Storage Efficiency Long File Names Networking

  6. Advantages of NTFS over FAT • The capability to recover from some disk-related errors automatically which FAT32 doesn't have. • Improved support for larger hard disks. • Better security because you can use permissions and encryption to restrict access to specific files to approved user. • Faster access speed. NTFS minimizes the number of disk accesses required to find a file.

  7. Conclusion • Disk fragmentation would reduce performance and reliability of our computer over time. Disk defragmentation should be performed regularly (weekly). • NTFS has more advanced features and is in overall better than the FAT file system.

  8. THE ENDTHANK YOUPresentedBySam Ka Wai

  9. References: • http://www.webopedia.com/TERM/F/fragmentation.html • http://files.diskeeper.com/pdf/The_effects_of_fragmentation_on_reliability.pdf