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File Systems and Disk Management

File Systems and Disk Management. Lecture 5 Hassan Shuja 10/19/2004. File Systems. Different File Systems FAT/FAT32 NTFS CDFS UDF. File Systems. FAT/FAT32 FAT Older and for management of smaller disk Compatible with NT/2k/9x/3.1/MS-DOS/OS/2 No security

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File Systems and Disk Management

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  1. File Systems and Disk Management Lecture 5 Hassan Shuja 10/19/2004

  2. File Systems • Different File Systems • FAT/FAT32 • NTFS • CDFS • UDF

  3. File Systems • FAT/FAT32 • FAT • Older and for management of smaller disk • Compatible with NT/2k/9x/3.1/MS-DOS/OS/2 • No security • Filenames up to 255 characters and not case sensitive • Volume size is 2GB in all systems, except for NT and W2k which is 4GB • You can format floppy disks • FAT32 • Only supported by W2k, Windows 98, and Windows 95 • No Security • Filename up to 255 characters and not case sensitive • Additional 32 bit application support • Volume is up to 32GB

  4. File Systems • NTFS • Only available in Windows 2000 and NT • Allows for security permission on files and folders • Supports Encryption File System (EFS) • Naming conventions similar to FAT/FAT32 • Theoretical size of volume can be 16 exabytes • Functional limit of 2TB • Additional Features • Supports compressions for files • Highly reliable and recoverable file system • NTFS allows for mounting of a space in a different volume • NTFS supports disk quotas

  5. File Systems • CDFS/UDF • CDFS • Supports access to compact discs • Not used for Hard disk and only for CD-ROM • UDF • Used to access read-only digital video discs (DVD)

  6. File Systems • Converting to NTFS • FAT can be converted to NTFS without the loss of data • Convert command is run in the command window • Convert D: /FS:NTFS /V • NTFS can be downgraded to FAT but it requires back up of data

  7. File Systems • Compression • In W2k all files and folders have ability to be compressed • Recommended for large files that are not used frequently • All files and folders moved between NTFS volumes inherit destination folders compression attribute • Files and Folders that are moved within the same NTFS volume retain their compression attribute • When moved or copied to a FAT volume, the compression attribute is lost

  8. File Systems • Disk Storage Types • Basic Disks • Contains primary or extended partitions • Can have up to maximum 4 partitions • Maximum of 4 Primary and 1 extended • Clustering is only available on this • Dynamic Disks • Support unlimited number of volumes that can span physical drives • Supports fault-tolerance • Only supported by Windows 2000

  9. File Systems • Partition • Primary • The OS is booted from this partition • Can only have 4 per disk • Extended • Can only have 1 per disk • Not bootable • Can be subdivided into one or more logical drives • Logical drives can be formatted with FAT,FAT32, or NTFS

  10. File Systems • Volume Types • Dynamic disks support 5 volume types: • Simple • Spanned • Striped • Mirrored • Raid-5

  11. File Systems • Volume Types • Simple • Can be formatted with FAT, FAT32, or NTFS • No fault tolerance • Supported by all 4 flavors of Windows 2000 • Spanned • Combines free space from 2 to 32 physical disks into a single volume • No fault tolerance • No Gain of speed or loss of speed in a spanned volume • Supported by all 4 flavors of Windows 2000

  12. File Systems • Volume Types • Striped • Similar to spanned that it allows from 2 to 32 physical disks into a single volume • Data is stored a block at a time, evenly and sequentially, among all of the disks in the striped volume • Fastest disk access • No fault tolerance • Also known as RAID 0 • Supported by all 4 flavors of Windows 2000

  13. File Systems • Volume Types • Mirrored • Similar to spanned that it allows from 2 to 32 physical disks into a single volume • A simple volume that is exactly duplicated onto a second dynamic disk • No Speed gain or loss • Supported by Windows 2000 Server, Advanced Server, and DataCenter Server • Also known as RAID 1 • Limited fault tolerance

  14. File Systems • Volume Types • RAID 3 • Similar to striped, but is fault tolerant • Logically distributes the information simultaneously across all disks designated for data, parity information is written on separate disk • Writing is slow but the read performance is the same as a striped volume • Supported by Windows 2000 Server, Advanced Server, and DataCenter Server • Limited fault tolerance

  15. File Systems • Volume Types • RAID 5 • Similar to striped, but is fault tolerant • Logically distributes the information simultaneously across all 3 or more disks, also parity information is written across all of the disks • Writing is slow but the read performance is the same as a striped volume • Supported by Windows 2000 Server, Advanced Server, and DataCenter Server • Limited fault tolerance

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