have a longer filename (up to 107 characters) than the usual Amiga limit, which was 31 characters. DOS\7: Long filenames for FFS (FFS-LNFS). There were no directory caching modes available for LNFS dostypes, and International Mode was always enabled. Despite the ability to use the long filenames, by this time FFS compared very poorly to other available filesystems on the platforms it was available for. Apart from these extra dostypes, there are little or no functional difference between FFS and FFS2 (although some older non-specified bugs may have been dealt with) and should still not be used except for legacy purposes. Disk validation is still necessary in FFS2 (and may still result in data loss) just as it was on FFS, despite early beliefs to the contrary. In September 2018, Hyperion Entertainment released Amiga OS 3.1.4 from the Amiga OS 3.1 source. It included an updated FastFileSystem V46 in the Kickstart ROM. The V46 FFS natively supported the APIs for TD_64, NSD, and/or the classic 32-bit TD_ storage calls. This lets the Amiga OS v3.x use and boot from large media (>4GB) natively, and support >2GB partition sizes. In July 2019, an additional file-based update to FFS was contained in the 3.1.4.1 update. In May 2021, an updated Amiga OS 3.2 was released and provided a matching ROM-based V47 FFS update which gained a few minor features and fixes. Other implementations There were few other implementations which are able to read FFS filesystems, which would normally require an Amiga emulator and a copy of the operating system ROMs to be read. Most notably, support for affs (Amiga Fast File System) can be compiled into Linux kernels, and offers full read, write and format support on FFS and OFS partitions of all dostypes except DOS\6 and DOS\7 (which are probably incredibly rare). On the Amiga, the freeware application xfs could, among many filesystems, read and write to devices formatted in OFS or FFS, and was probably the sole Amiga filesystem apart from FFS/FFS2 itself to do so. It did not support DOS\6 or DOS\7, which it predates, or formatting of devices. See also List of file systems OFS Professional File System Smart File System References External links The ADFlib Page and precisely ADF File specs The ADF specs, in LHA format from Aminet Disk file systems Amiga AmigaOS MorphOS File systems supported by the Linux kernel