On the [[Amiga]], the '''Old File System''' was the filesystem for [[Amiga OSAmigaOS]] before the [[Amiga Fast File System]]. Even though it used 512-byte blocks, it reserved the first small portion of each [[Block (data storage)|block]] for [[Metadata (computing)|metadata]], leaving an actual data block capacity of 488 bytes per block. It wasn't very suitable for anything except [[floppy disk]]s, and it was soon replaced.
== History ==
Originally known as the Amiga File System, theit filesystemcame itselffrom wasthe very similar to thatfilesystem of [[XeroxTRIPOS]], Altowhich Filesystem.formed Developmentthe wasbasis fromof 1982the tofirst 1985 as the filesystemversions of [[TripOSAmigaDOS]]. It received the nickname of "Old" or "Original" File System when [[Amiga Fast File System|Fast File System]] was released with [[Amiga OS]]AmigaOS 1.3.
OFS is very good for repairing the filesystem in the event of a problem, although the so-called DiskDoctor provided by Commodore quickly earned the name DiskDestroyer, because it could not repair No-DOS type autostart disks provided by third-party software manufacturers as bootable disks for games. The idea to create non-standard autobootable disks was born in a primitive attempt to prevent copy of such disks and to avoid the loading and launch of Amiga DOS, in order to directly access the Amiga graphic, audio and memory chipsets. DiskDoctor in fact changed autostart disks bootblocks into standard AmigaDOS-based ones, renaming a disk with "Lazarus" namedisk, and made the autostart disk unusable.
Metacomco, BSTRINGS, BPOINTERS, and family contained in the Amiga FS entered the scene{{Clarify|date=August 2011}} when it was decided that the originally planned OS would take too long to be developed in time for the launch of Amiga. Consequently, Metacomco grafted onto the filesystem a lot of things{{Specify|date=August 2011}} that the old Amiga Inc. has changed.
