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File Allocation Table

File Allocation Table (FAT) is a file system developed for personal computers and was the default file system for the DOS and Windows 9x operating systems. Originally developed in 1977 for use on floppy disks, it was adapted for use on hard disks and other devices. The increase in disk drive capacity over time drove modifications to the design that…

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Attributes
Read-only, hidden, system, volume, directory, archive
Bad blocks
Cluster tagging
Date range
1980-01-01 to 2099-12-31 (2107-12-31)
Date resolution
2 seconds for last modified time, · 2 seconds for creation time, · 1 day for access date, · 2 seconds for deletion time
Dates recorded
Modified date/time, creation date/time (DOS 7.0 and higher only), · access date (only available with ACCDATE enabled), · deletion date/time (only with DELWATCH 2)
Developer(s)
Microsoft, NCR, SCP, IBM, Compaq, Digital Research, Novell, Caldera

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File Allocation Table

Nodes228
Edges227
Triples83
Avg. degree1.99
Density0.008772
Components1

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File Allocation Table

Top relations

related to exFAT · 13
File Allocation Table → FAT32, GB, It, Its, Memory Stick XC, November, SDXC, Vendors, Vista Service Pack, Windows Embedded CE, Windows XP Service Pack, Windows NT, Windows XP Update KB955704
related to Technical details · 7
File Allocation Table → As, Each, Even, FAT, Sub-directories, The, The FAT
File system permissions · 5
File Allocation Table → execute with only FlexOS, 4680 OS, 4690 OS;, FAT12/FAT16: File, directory and volume access rights for read, write, execute, delete only with DR-DOS, PalmDOS, Novell DOS, OpenDOS, FlexOS, 4680 OS, 4690 OS, Concurrent DOS,…, FAT32: Partial, only with DR-DOS, REAL/32 and 4690 OS, individual file / directory passwords not with FlexOS, 4680 OS, 4690 OS;, world/group/owner permission classes only with multiuser security loaded
Date resolution · 4
File Allocation Table → 1 day for access date,, 2 seconds for creation time,, 2 seconds for deletion time, 2 seconds for last modified time,
Partition IDs · 4
File Allocation Table → BDP: EBD0A0A2-B9E5-4433-87C0-68B6B72699C7, FAT12: 0x01 e.a. (Extended Attribute), FAT16: 0x040x060x0E e.a., FAT32: 0x0B0x0C e.a.
Dates recorded · 3
File Allocation Table → access date (only available with ACCDATE enabled),, deletion date/time (only with DELWATCH 2), Modified date/time, creation date/time (DOS 7.0 and higher only),
Max no. of files · 3
File Allocation Table → FAT12: 4,068 for 8 KB clusters, FAT16: 65,460 for 32 KB clusters, FAT32: 268,173,300 for 32 KB clusters
Max volume size · 3
File Allocation Table → FAT12: 32 MB (256 MB for 64 KB clusters), FAT16: 2 GB (4 GB for 64 KB clusters), FAT32: 2 TB (16 TB for 4 KB sectors)
Transparent compression · 2
File Allocation Table → FAT12/FAT16: Per-volume, SuperStor, Stacker, DoubleSpace, DriveSpace, FAT32: No
Transparent encryption · 2
File Allocation Table → FAT12/FAT16: Per-volume only with DR-DOS, FAT32: No

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Important terminology

fat file fat32 fat16 system disk windows fat12 dos size microsoft directory ms-dos partition cluster support systems used operating filenames

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
File Allocation TableAttributesRead-only, hidden, system, volume, directory, archive1.00infobox
File Allocation TableBad blocksCluster tagging1.00infobox
File Allocation TableDate range1980-01-01 to 2099-12-31 (2107-12-31)1.00infobox
File Allocation TableDate resolution2 seconds for last modified time,1.00infobox
File Allocation TableDate resolution2 seconds for creation time,1.00infobox
File Allocation TableDate resolution1 day for access date,1.00infobox
File Allocation TableDate resolution2 seconds for deletion time1.00infobox
File Allocation TableDates recordedModified date/time, creation date/time (DOS 7.0 and higher only),1.00infobox
File Allocation TableDates recordedaccess date (only available with ACCDATE enabled),1.00infobox
File Allocation TableDates recordeddeletion date/time (only with DELWATCH 2)1.00infobox
File Allocation TableDeveloper(s)Microsoft, NCR, SCP, IBM, Compaq, Digital Research, Novell, Caldera1.00infobox
File Allocation TableDirectory contentsTable1.00infobox
File Allocation TableFile allocationLinked list1.00infobox
File Allocation TableFile system permissionsFAT12/FAT16: File, directory and volume access rights for read, write, execute, delete only with DR-DOS, PalmDOS, Novell DOS, OpenDOS, FlexOS, 4680 OS, 4690 OS, Concurrent DOS,…1.00infobox
File Allocation TableFile system permissionsexecute with only FlexOS, 4680 OS, 4690 OS;1.00infobox
File Allocation TableFile system permissionsindividual file / directory passwords not with FlexOS, 4680 OS, 4690 OS;1.00infobox
File Allocation TableFile system permissionsworld/group/owner permission classes only with multiuser security loaded1.00infobox
File Allocation TableFile system permissionsFAT32: Partial, only with DR-DOS, REAL/32 and 4690 OS1.00infobox
File Allocation TableForksNot natively1.00infobox
File Allocation TableFull nameFile Allocation Table1.00infobox
File Allocation TableIntroduced1977 (1977) with Standalone Disk BASIC-801.00infobox
File Allocation TableMax file size4,294,967,295 bytes (4 GB − 1) with FAT16B and FAT321.00infobox
File Allocation TableMax filename length8.3 filename, or 255 UCS-2 characters when using LFN[nb 1]1.00infobox
File Allocation TableMax no. of filesFAT12: 4,068 for 8 KB clusters1.00infobox
File Allocation TableMax no. of filesFAT16: 65,460 for 32 KB clusters1.00infobox
File Allocation TableMax no. of filesFAT32: 268,173,300 for 32 KB clusters1.00infobox
File Allocation TableMax volume sizeFAT12: 32 MB (256 MB for 64 KB clusters)1.00infobox
File Allocation TableMax volume sizeFAT16: 2 GB (4 GB for 64 KB clusters)1.00infobox
File Allocation TableMax volume sizeFAT32: 2 TB (16 TB for 4 KB sectors)1.00infobox
File Allocation TablePartition IDsFAT12: 0x01 e.a. (Extended Attribute)1.00infobox

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