Forks and Alternate Data Streams
The FAT file system itself is not designed for supporting Alternate Data Streams (ADS), but some operating systems that heavily depend on them have devised various methods for handling them in FAT drives. Such methods either store the additional information in extra files and directories (Mac OS), or give new semantics to previously unused fields of the FAT on-disk data structures (OS/2 and Windows NT).
Mac OS using PC Exchange stores its various dates, file attributes and long filenames in a hidden file called "FINDER.DAT", and resource forks (a common Mac OS ADS) in a subdirectory called "RESOURCE.FRK", in every directory where they are used. From PC Exchange 2.1 onwards, they store the Mac OS long filenames as standard FAT long filenames and convert FAT filenames longer than 31 characters to unique 31-character filenames, which can then be made visible to Macintosh applications.
Mac OS X stores resource forks and metadata (file attributes, other ADS) in a hidden file with a name constructed from the owner filename prefixed with "._", and Finder stores some folder and file metadata in a hidden file called ".DS_Store".
Read more about this topic: FATX, Historical Evolution, Extensions
Famous quotes containing the words forks and, forks, alternate, data and/or streams:
“Just think of all the spare time that has flown
Straight into nothingness by being filled
With forks and faces....”
—Philip Larkin (1922–1986)
“Just think of all the spare time that has flown
Straight into nothingness by being filled
With forks and faces....”
—Philip Larkin (1922–1986)
“I alternate treading water
and deadman’s float.”
—Anne Sexton (1928–1974)
“This city is neither a jungle nor the moon.... In long shot: a cosmic smudge, a conglomerate of bleeding energies. Close up, it is a fairly legible printed circuit, a transistorized labyrinth of beastly tracks, a data bank for asthmatic voice-prints.”
—Susan Sontag (b. 1933)
“The fish in neighboring streams and lakes are so voracious, it is said, that fishermen have to stand out of sight behind trees while baiting their hooks.”
—For the State of Florida, U.S. public relief program (1935-1943)