fs in Plan9
The terms file server, file system and the abbreviation
appear a lot in Plan9 documentation. For example, there are the manpages
fs(4) aka Ken's FS. This was a file server
inside the kernel which required a specially built kernel and
was used together with a dedicated CPU server and
many terminals. It is not part of the kernel sources any more,
but its manpage lives on. To add confusion, there is also a
for the console of Ken's
Then there is
a file system for terminals.
It is implemented in user-space. No relation to Ken's FS besides the name.
Strangely there seems to be no option to repair
If the file system is inconsistent, the user is asked for permission to ream (q.v.) the disk.
(reaming means deleting).
kfs cannot be managed by a console like Ken's
by options to an executable
kfscmd has commands to repair a broken
As another example for the non-injectivity of abbreviations, there's
which is not a file system at all, but a kind of soft-raid that allows concatenation,
striping and (simple) mirroring of files, e.g. disks.
On the fourth hand, there is
This is the current default for CPU and File servers. It can be configured to
move its blocks to an archival storage server
It is managed with its own console
which attaches itself not as