Originally known as the Amiga File System, it came from the filesystem of TRIPOS, which formed the basis of the first versions of AmigaDOS.
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.