reiserfsck(8) - phpMan

REISERFSCK(8) REISERFSCK(8)

NAME
reiserfsck - The checking tool for the ReiserFS filesystem.

DESCRIPTION
Reiserfsck searches for a Reiserfs filesystem on a device, replays any necessary transac-
tions, and either checks or repairs the file system.

device is the special file corresponding to a device or to a partition (e.g /dev/hdXX for
an IDE disk partition or /dev/sdXX for a SCSI disk partition).

OPTIONS
--rebuild-sb
This option recovers the superblock on a Reiserfs partition. Normally you only
need this option if mount reports "read_super_block: can't find a reiserfs file
system" and you are sure that a Reiserfs file system is there. But remember that if
you have used some partition editor program and now you cannot find a filesystem,
probably something has gone wrong while repartitioning and the start of the parti-
tion has been changed. If so, instead of rebuilding the super block on a wrong
place you should find the correct start of the partition first.

--check
This default action checks filesystem consistency and reports, but does not repair
any corruption that it finds. This option may be used on a read-only file system
mount.

--fix-fixable
This option recovers certain kinds of corruption that do not require rebuilding the
entire file system tree (--rebuild-tree). Normally you only need this option if the
--check option reports "corruption that can be fixed with --fix-fixable". This
includes: zeroing invalid data-block pointers, correcting st_size and st_blocks for
directories, and deleting invalid directory entries.

--rebuild-tree
This option rebuilds the entire filesystem tree using leaf nodes found on the
device. Normally you only need this option if the reiserfsck --check reports "Run-
ning with --rebuild-tree is required". You are strongly encouraged to make a backup
copy of the whole partition before attempting the --rebuild-tree option. Once reis-
erfsck --rebuild-tree is started it must finish its work (and you should not inter-
rupt it), otherwise the filesystem will be left in the unmountable state to avoid
subsequent data corruptions.

--clean-attributes
This option cleans reserved fields of Stat-Data items. There were days when there
were no extended attributes in reiserfs. When they were implemented old partitions
needed to be cleaned first -- reiserfs code in the kernel did not care about not
used fields in its structures. Thus if you have used one of the old (pre-
attributes) kernels with a ReiserFS filesystem and you want to use extented
attributes there, you should clean the filesystem first.

--journal device , -j device
This option supplies the device name of the current file system journal. This
option is required when the journal resides on a separate device from the main data
device (although it can be avoided with the expert option --no-journal-available).

--adjust-size, -z
This option causes reiserfsck to correct file sizes that are larger than the offset
of the last discovered byte. This implies that holes at the end of a file will be
removed. File sizes that are smaller than the offset of the last discovered byte
are corrected by --fix-fixable.

--badblocks file, -B file
This option sets the badblock list to be the list of blocks specified in the given
`file`. The filesystem badblock list is cleared before the new list is added. It
can be used with --fix-fixable to fix the list of badblocks (see debugreiserfs -B).
If the device has bad blocks, every time it must be given with the --rebuild-tree
option.

--logfile file, -l file
This option causes reiserfsck to report any corruption it finds to the specified
log file rather than to stderr.

--nolog, -n
This option prevents reiserfsck from reporting any kinds of corruption.

--quiet, -q
This option prevents reiserfsck from reporting its rate of progress.

--yes, -y
This option inhibits reiserfsck from asking you for confirmation after telling you
what it is going to do. It will assume you confirm. For safety, it does not work
with the --rebuild-tree option.

-a, -p These options are usually passed by fsck -A during the automatic checking of those
partitions listed in /etc/fstab. These options cause reiserfsck to print some
information about the specified filesystem, to check if error flags in the
superblock are set and to do some light-weight checks. If these checks reveal a
corruption or the flag indicating a (possibly fixable) corruption is found set in
the superblock, then reiserfsck switches to the fix-fixable mode. If the flag indi-
cating a fatal corruption is found set in the superblock, then reiserfsck finishes
with an error.

-V This option prints the reiserfsprogs version and then exit.

-r, -f These options are not yet operational and therefore are ignored.

EXPERT OPTIONS
DO NOT USE THESE OPTIONS UNLESS YOU KNOW WHAT YOU ARE DOING. WE ARE NOT RESPONSIBLE IF
YOU LOSE DATA AS A RESULT OF THESE OPTIONS.

--no-journal-available
This option allows reiserfsck to proceed when the journal device is not available.
This option has no effect when the journal is located on the main data device.
NOTE: after this operation you must use reiserfstune to specify a new journal
device.

--scan-whole-partition, -S
This option causes --rebuild-tree to scan the whole partition but not only the used
space on the partition.

AN EXAMPLE OF USING reiserfsck
1. You think something may be wrong with a reiserfs partition on /dev/hda1 or you would
just like to perform a periodic disk check.

2. Run reiserfsck --check --logfile check.log /dev/hda1. If reiserfsck --check exits with
status 0 it means no errors were discovered.

3. If reiserfsck --check exits with status 1 (and reports about fixable corruptions) it
means that you should run reiserfsck --fix-fixable --logfile fixable.log /dev/hda1.

4. If reiserfsck --check exits with status 2 (and reports about fatal corruptions) it
means that you need to run reiserfsck --rebuild-tree. If reiserfsck --check fails in some
way you should also run reiserfsck --rebuild-tree, but we also encourage you to submit
this as a bug report.

5. Before running reiserfsck --rebuild-tree, please make a backup of the whole partition
before proceeding. Then run reiserfsck --rebuild-tree --logfile rebuild.log /dev/hda1.

6. If the reiserfsck --rebuild-tree step fails or does not recover what you expected,
please submit this as a bug report. Try to provide as much information as possible includ-
ing your platform and Linux kernel version. We will try to help solve the problem.

EXIT CODES
reiserfsck uses the following exit codes:
0 - No errors.
1 - File system errors corrected.
2 - Reboot is needed.
4 - File system fatal errors left uncorrected,
reiserfsck --rebuild-tree needs to be launched.
6 - File system fixable errors left uncorrected,
reiserfsck --fix-fixable needs to be launched.
8 - Operational error.
16 - Usage or syntax error.

AUTHOR
This version of reiserfsck has been written by Vitaly Fertman <vitaly AT namesys.com>.

BUGS
Please report bugs to the ReiserFS developers <reiserfs-dev AT namesys.com>, providing as
much information as possible--your hardware, kernel, patches, settings, all printed mes-
sages, the logfile; check the syslog file for any related information.

TODO
Faster recovering, signal handling.

SEE ALSO
mkreiserfs(8), reiserfstune(8) resize_reiserfs(8), debugreiserfs(8),

Reiserfsprogs-3.6.19 February 2004 REISERFSCK(8)

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