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File Allocation Table (FAT) is a file system developed for personal computers and was the default file system for the MS-DOS and Windows 9x operating systems. [citation needed] Originally developed in 1977 for use on floppy disks, it was adapted for use on hard disks and other devices.
A basic data partition can be formatted with any file system, although most commonly BDPs are formatted with the NTFS, exFAT, or FAT32 file systems. To programmatically determine which file system a BDP contains, Microsoft specifies that one should inspect the BIOS Parameter Block that is contained in the BDP's Volume Boot Record .
A block, a contiguous number of bytes, is the minimum unit of storage that is read from and written to a disk by a disk driver.The earliest disk drives had fixed block sizes (e.g. the IBM 350 disk storage unit (of the late 1950s) block size was 100 six-bit characters) but starting with the 1301 [8] IBM marketed subsystems that featured variable block sizes: a particular track could have blocks ...
A Windows command-line utility called convert.exe can convert supporting file systems to NTFS, ... FAT16 and FAT32 ... (USB flash drives, external hard drives, ...
FORMAT.COM, among several other commands, in IBM PC DOS 1.0. FORMAT.CMD in CP/M-86. The command is also available in Intel ISIS-II, [5] iRMX 86, [6] MetaComCo TRIPOS, [7] AmigaDOS, [8] Zilog Z80-RIO, [9] Microware OS-9, [10] DR FlexOS, [11] TSL PC-MOS, [12] SpartaDOS X, [13] Datalight ROM-DOS, [14] IBM/Toshiba 4690 OS, [15] PTS-DOS, [16] SISNE plus, [17] and in the DEC RT-11 [18] operating system.
Two experimental, unofficial solutions are available for DOS. The loadable USBEXFAT driver requires Panasonic's USB stack for DOS and only works with USB storage devices; the open-source EXFAT executable is an exFAT file-system reader and requires the HX DOS extender to work. [75]
convert is an external command first introduced with Windows 2000. [2] If the drive cannot be locked (for example, the drive is the system volume or the current drive) the command gives the option to convert the drive the next time the computer is restarted.
The partition type (or partition ID) in a partition's entry in the partition table inside a master boot record (MBR) is a byte value intended to specify the file system the partition contains or to flag special access methods used to access these partitions (e.g. special CHS mappings, LBA access, logical mapped geometries, special driver access, hidden partitions, secured or encrypted file ...