FAT12

E708152

FAT12 is an early version of the File Allocation Table filesystem used primarily on floppy disks and very small storage devices.

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Observed surface forms (1)

Surface form Occurrences
FAT12 file system 1

Statements (54)

Predicate Object
instanceOf FAT file system variant
disk file system
file system
clusterEntrySizeBits 12
compatibleWith most BIOS boot loaders for PCs
designedFor floppy disks
small-capacity storage devices
directoryEntrySizeBytes 32
fileSystemFamily FAT
firstTwoFATEntriesReserved true
hasBootSectorField OEM name
bytes per sector
hidden sectors
media descriptor
number of FATs
number of heads
root directory entries
sectors per FAT
sectors per cluster
sectors per track
total sectors
introduced early 1980s
limitation inefficient for larger disks
small maximum volume size
longFilenamesViaVFAT possible
maximumNumberOfClusters 4096
numberOfBitsPerClusterEntry 12
optimizedFor small volumes with low cluster counts
storesFATIn reserved area after boot sector
successor FAT16 NERFINISHED
FAT32 NERFINISHED
supports contiguous and fragmented file allocation
supports8.3Filenames true
supportsBootSector true
supportsDataRegion true
supportsFileAttributes archive
directory
hidden
read-only
system
volume label
supportsLongFilenames false (originally)
supportsRootDirectoryRegion true
supportsSubdirectories true
typicallyHasNumberOfFATs 2
typicalMaximumVolumeSize up to 16 MB
usedBy MS-DOS NERFINISHED
PC DOS NERFINISHED
early versions of Windows
usedOn 3.5-inch floppy disks
5.25-inch floppy disks
8-inch floppy disks
RAM disks
usesAllocationTableType File Allocation Table NERFINISHED

Referenced by (4)

Full triples — surface form annotated when it differs from this entity's canonical label.

FAT tables usedBy FAT12
subject surface form: FAT table
BIOS Parameter Block usedIn FAT12
this entity surface form: FAT12 file system