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FSCK(8) System Administration FSCK(8)
NAME
fsck.minix - check consistency of Minix filesystem
SYNOPSIS
fsck.minix [-larvsmf] device
DESCRIPTION
fsck.minix performs a consistency check for the Linux MINIX filesystem. The current ver-
sion supports the 14 character and 30 character filename options.
The program assumes the filesystem is quiescent. fsck.minix should not be used on a
mounted device unless you can be sure nobody is writing to it (and remember that the ker-
nel can write to it when it searches for files).
The device name will usually have the following form:
/dev/hda[1-63] (IDE disk 1)
/dev/hdb[1-63] (IDE disk 2)
/dev/sda[1-15] (SCSI disk 1)
/dev/sdb[1-15] (SCSI disk 2)
If the filesystem was changed (i.e., repaired), then fsck.minix will print "FILE SYSTEM
HAS CHANGED" and will sync(2) three times before exiting. Since Linux does not currently
have raw devices, there is no need to reboot at this time.
WARNING
fsck.minix should not be used on a mounted filesystem. Using fsck.minix on a mounted
filesystem is very dangerous, due to the possibility that deleted files are still in use,
and can seriously damage a perfectly good filesystem! If you absolutely have to run
fsck.minix on a mounted filesystem (i.e., the root filesystem), make sure nothing is writ-
ing to the disk, and that no files are "zombies" waiting for deletion.
OPTIONS
-l List all filenames.
-r Perform interactive repairs.
-a Perform automatic repairs. (This option implies -r and serves to answer all of the
questions asked with the default.) Note that this can be extremely dangerous in
the case of extensive filesystem damage.
-v Be verbose.
-s Output super-block information.
-m Activate MINIX-like "mode not cleared" warnings.
-f Force a filesystem check even if the filesystem was marked as valid (this marking
is done by the kernel when the filesystem is unmounted).
SEE ALSO
fsck(8), fsck.ext2(8), mkfs(8), mkfs.minix(8), mkfs.ext2(8), reboot(8)
DIAGNOSTICS
There are numerous diagnostic messages. The ones mentioned here are the most commonly
seen in normal usage.
If the device does not exist, fsck.minix will print "unable to read super block". If the
device exists, but is not a MINIX filesystem, fsck.minix will print "bad magic number in
super-block".
EXIT CODES
The exit code returned by fsck.minix is the sum of the following:
0 No errors
3 Filesystem errors corrected, system should be rebooted if filesystem was mounted
4 Filesystem errors left uncorrected
7 Combination of exit codes 3 and 4
8 Operational error
16 Usage or syntax error
In point of fact, only 0, 3, 4, 7, 8, and 16 can ever be returned.
AUTHOR
Linus Torvalds (torvalds AT cs.fi)
Error code values by Rik Faith (faith AT cs.edu)
Added support for filesystem valid flag: Dr. Wettstein (greg%wind.uucp AT plains.edu)
Check to prevent fsck of mounted filesystem added by Daniel Quinlan (quin-
lan AT yggdrasil.com)
Minix v2 fs support by Andreas Schwab (schwab AT issan.de), updated
by Nicolai Langfeldt (janl AT math.no)
Portability patch by Russell King (rmk AT ecs.uk).
AVAILABILITY
The fsck.minix command is part of the util-linux package and is available from
ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
util-linux July 1996 FSCK(8)
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