Ever wondered Partiation sizes?

Discussion in 'Windows Desktop Systems' started by drz01, Aug 24, 2004.

  1. drz01

    drz01 Weekend DJ

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    File Allocation Table (FAT) Guide

    Operating System
    FAT16
    FAT32
    NTFS

    Windows XP




    Windows 2000




    Windows NT 4.01




    Windows 95 OSR2, Windows 98, and Windows Me




    Windows 95 (prior to OSR2)




    MS-DOS







    Table 13.5 NTFS Size Limits

    Description
    Limit

    Maximum file size
    Theory: 16 exabytes minus 1 KB (264 bytes minus 1 KB)

    Implementation: 16 terabytes minus 64 KB (244 bytes minus 64 KB)

    Maximum volume size
    Theory: 264 clusters minus 1 cluster

    Implementation: 256 terabytes minus 64 KB ( 232 clusters minus 1 cluster)

    Files per volume
    4,294,967,295 (232 minus 1 file)


    Maximum Sizes on FAT32 Volumes
    A FAT32 volume must have a minimum of 65,527 clusters. Windows XP Professional can format FAT32 volumes up to 32 GB, but it can mount larger FAT32 volumes created by other operating systems. Table 13.6 lists FAT32 size limits.

    Table 13.6 FAT32 Size Limits

    Description
    Limit

    Maximum file size
    4 GB minus 1 byte (232 bytes minus 1 byte)

    Maximum volume size
    32 GB (implementation)

    Files per volume
    4,177,920

    Maximum number of files and subfolders within a single folder
    65,534 (The use of long file names can significantly reduce the number of available files and subfolders within a folder.)


    Maximum Sizes on FAT16 Volumes
    FAT16 supports a maximum of 65,524 clusters per volume. Table 13.7 lists FAT16 size limits.

    Table 13.7 FAT16 Size Limits

    Description
    Limit

    Maximum file size
    4 GB minus 1 byte (232 bytes minus 1 byte)

    Maximum volume size
    4 GB

    Files per volume
    Approximately 65,536 (216 files)

    Maximum number of files and folders within the root folder
    512 (Long file names can reduce the number of available files and folders in the root folder.)


    Table 13.4 Default Cluster Sizes for Volumes with Windows XP Professional File Systems

    Volume Size
    FAT16 Cluster Size
    FAT32 Cluster Size
    NTFS Cluster Size

    7 MB–16 MB
    2 KB
    Not supported
    512 bytes

    17 MB–32 MB
    512 bytes
    Not supported
    512 bytes

    33 MB–64 MB
    1 KB
    512 bytes
    512 bytes

    65 MB–128 MB
    2 KB
    1 KB
    512 bytes

    129 MB–256 MB
    4 KB
    2 KB
    512 bytes

    257 MB–512 MB
    8 KB
    4 KB
    512 bytes

    513 MB–1,024 MB
    16 KB
    4 KB
    1 KB

    1,025 MB–2 GB
    32 KB
    4 KB
    2 KB

    2 GB–4 GB
    64 KB
    4 KB
    4 KB

    4 GB–8 GB
    Not supported
    4 KB
    4 KB

    8 GB–16 GB
    Not supported
    8 KB
    4 KB

    16 GB–32 GB
    Not supported
    16 KB
    4 KB

    32 GB–2 terabytes
    Not supported
    Not supported1
    4 KB






    Options Available When You Format a Volume

    Format Option
    Where the Option Is Available


    Setup
    My Computer or Windows Explorer
    Disk Management
    Format Command

    Volume label
    No option to create a volume label.
    Available for all volumes.
    Available for all volumes.
    Use the /v:label parameter to specify the volume label.

    Quick format
    Available for all volumes.
    Available for all volumes.
    Available for all volumes.
    Use the /q parameter to specify the quick format option.

    Enable compression
    No option to compress the volume.
    Available for NTFS volumes.
    Available for NTFS volumes.
    Use the /c parameter to enable compression for NTFS volumes.

    Allocation unit (cluster) size
    Uses the default cluster size only.
    Offers default cluster sizes for FAT volumes and clusters sizes up to 4 KB for NTFS volumes.
    Offers all available cluster sizes.
    Use the /a:size parameter to specify the cluster size.




    BY: MRA - 06/2002