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First logical sector number of a copy of the three FAT32 boot sectors, typically 6. [4] Since DR-DOS 7.0x FAT32 formatted volumes use a single-sector boot sector, some volumes formatted under DR-DOS use a value of 2 here. Values of 0x0000 [4] (and/or 0xFFFF [19]) are reserved and indicate that no backup sector is available. 0x034 0x29 12
File Allocation Table (FAT) is a file system developed for personal computers and was the default filesystem 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.
For example, the FAT32 file system does not support files larger than 4 GiB−1 (with older applications even only 2 GiB−1); the variant FAT32+ does support larger files (up to 256 GiB−1), but (so far) is only supported in some versions of DR-DOS, [2] [3] so users of Microsoft Windows have to use NTFS or exFAT instead.
All of the Linux filesystem drivers support all three FAT types, namely FAT12, FAT16 and FAT32.Where they differ is in the provision of support for long filenames, beyond the 8.3 filename structure of the original FAT filesystem format, and in the provision of Unix file semantics that do not exist as standard in the FAT filesystem format such as file permissions. [1]
FAT12, FAT16 and FAT32 also have a limit of eight characters for the file name, and three characters for the extension (such as .exe). This is commonly referred to as the 8.3 filename limit. VFAT , an optional extension to FAT12, FAT16 and FAT32, introduced in Windows 95 and Windows NT 3.5 , allowed long file names ( LFN ) to be stored in the ...
Because file size references are stored in eight instead of four bytes, the file size limit has increased to 16 exabytes (EB) (2 64 − 1 bytes, or about 10 19 bytes, which is otherwise limited by a maximum volume size of 128 PB, [nb 2] or 2 57 − 1 bytes), raised from 4 GB (2 32 − 1 bytes) in a standard FAT32 file system. [1]
FAT32, FAT32X: Microsoft: 1996 MS-DOS 7.10 / Windows 95 OSR2 [b] QFS: Sun Microsystems: 1996 ... Copy on write Trim support DECtape: No No No No No No No No BeeGFS ...
FAT32 supports files up to 4 GB. FAT32 is the factory format of larger USB drives and all SDHC cards that are 4 GB or larger. exFAT supports files up to 127 PB. exFAT is the factory format of all SDXC cards, but is incompatible with most flavors of UNIX due to licensing problems. NTFS supports files up to 16 TB.