DFS - Revision history

JTN: /* Overview */ less sure about double-density 5¼" discs using DFS now

2026-03-25T01:24:49Z

‎Overview: less sure about double-density 5¼" discs using DFS now

JTN: minimal page

2026-03-25T01:08:17Z

minimal page

New page

{{FormatInfo
|formattype=electronic
|subcat=Filesystem
|wikidata={{wikidata|Q5281381}}
}}

== Overview ==
The Disc Filing System (DFS) was the filesystem format used for floppy disks by Acorn's early 8-bit computers, such as the BBC Micro. Acorn [[Acorn single density 5 1/4" disk|single]] and [[Acorn double density 5 1/4" disk|double density 5¼" disks]] would typically contain a DFS filesystem.

DFS was a very simple filesystem, supporting a only small number of contiguous files with 7-character names in a flat structure (although files could be assigned to single-letter "directories", similar to [[CP/M file system|CP/M]]'s user numbers).

DFS was superseded by the [[ADFS|Advanced Disc Filing System (ADFS)]], which was available on Acorn's later 8-bit computers such as the Master Compact (and more commonly used than DFS on that machine's [[Acorn double density 3 1/2" disk|3½" disks]]), as well as the 32-bit Archimedes and later.

== Resources ==
* [https://en.wikipedia.org/wiki/Disc_Filing_System Wikipedia]
* [https://beebwiki.mdfs.net/index.php/Acorn_DFS_disc_format Acorn DFS disc format] on BeebWiki
* [https://github.com/monkeyman79/dfsimage dfsimage]: Python software which understands the DFS filesystem format

[[Category:Acorn computers]]

@@ Line 6: / Line 6: @@
 == Overview ==
-The Disc Filing System (DFS) was the filesystem format used for floppy disks by Acorn's early 8-bit computers, such as the BBC Micro. Acorn [[Acorn single density 5 1/4" disk|single]] and [[Acorn double density 5 1/4" disk|double density 5¼" disks]] would typically contain a DFS filesystem.
+The Disc Filing System (DFS) was the filesystem format used for floppy disks by Acorn's early 8-bit computers, such as the BBC Micro. Acorn [[Acorn single density 5 1/4" disk|single density 5¼" disks]] would typically contain a DFS filesystem.
 DFS was a very simple filesystem, supporting a only small number of contiguous files with 7-character names in a flat structure (although files could be assigned to single-letter "directories", similar to [[CP/M file system|CP/M]]'s user numbers).