Partition Size vs. Cluster Size

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The following is a table of logical drive sizes, FAT (File Allocation Table) types, and cluster sizes:

                 Drive Size       FAT Type     Sectors     Cluster
               (logical volume)              Per Cluster     Size
               ----------------   --------   -----------   -------

(Floppy Disks)      360K           12-bit         2         1K
                    720K           12-bit         2         1K
                   1.2 MB          12-bit         1       512 bytes
                   1.44 MB         12-bit         1       512 bytes
                   2.88 MB         12-bit         2         1K

(Hard Disks)     0 MB - 15 MB      12-bit         8         4K
                16 MB - 127 MB     16-bit         4         2K
               128 MB - 255 MB     16-bit         8         4K
               256 MB - 511 MB     16-bit        16         8K
               512 MB - 1023 MB    16-bit        32        16K
              1024 MB - 2048 MB    16-bit        64        32K

The following is a table of logical drive sizes and cluster sizes for a FAT32 file system:

	Logical Drive Size       Cluster size
	-------------------------------------
	512 MB to 8,191 MB          4 KB
	8,192 MB to 16,383 MB       8 KB
	16,384 MB to 32,767 MB     16 KB
	Larger than 32,768 MB      32 KB

The following is a table of logical drive sizes, cluster sizes and numbers of sectors for a NTFS file system:

	Logical Drive Size          Cluster Size       Number of Sectors
	---------------------       ----------------   -----------------
	512 MB  or less              512 bytes          1
	513 MB  to 1024 MB (1GB)    1024 bytes (1 KB)   2
	1025 MB to 2048 MB (2GB)    2048 bytes (2 KB)   4
	2049 MB and larger          4096 bytes (4 KB)   8

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