REISERFSCK(8) System Manager's Manual REISERFSCK(8)
reiserfsck - The checking tool for the ReiserFS filesystem.
reiserfsck [ -afprVy ] [ --rebuild-sb | --check | --fix-fixable |
--rebuild-tree | --clean-attributes ] [ -j | --journal device ] [ -z |
--adjust-size ] [ -n | --nolog ] [ -B | --badblocks file ] [ -l |
--logfile file ] [ -q | --quiet ] [ -y | --yes ] [ -S | --scan-whole-
partition ] [ --no-journal-available ] device
Reiserfsck searches for a Reiserfs filesystem on a device, replays any
necessary transactions, 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
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 can-
not find a filesystem, probably something has gone wrong while
repartitioning and the start of the partition 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.
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.
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
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 "Running 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 reiserfsck --rebuild-tree is started it must finish its
work (and you should not interrupt it), otherwise the filesystem
will be left in the unmountable state to avoid subsequent data
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 strutures. Thus if you have used one of the old
(pre-attrbutes) kernels with a ReiserFS filesystem and you want
to use extented attribues there, you should clean the filesystem
--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).
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
--logfile file, -l file
This option causes reiserfsck to report any corruption it finds
to the specified log file rather than to stderr.
This option prevents reiserfsck from reporting any kinds of cor-
This option prevents reiserfsck from reporting its rate of
This option inhibits reiserfsck from asking you for confirmation
after telling you what it is going to do. It will assuem you
confirm. For safety, it does not work with the --rebuild-tree
-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) corrup-
tion is found set in the superblock, then reiserfsck switches to
the fix-fixable mode. If the flag indicating a fatal corruption
is found set in the superblock, then reiserfsck finishes with an
-V This option prints the reiserfsprogs version and then exit.
-r, -f These options are not yet operational and therefore are ignored.
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.
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.
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
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 including your platform and Linux kernel
version. We will try to help solve the problem.
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.
This version of reiserfsck has been written by Vitaly Fertman
Please report bugs to the ReiserFS developers <reiserfs-
devATnamesys.com>, providing as much information as possible--your hard-
ware, kernel, patches, settings, all printed messages, the logfile;
check the syslog file for any related information.
Faster recovering, signal handling.
mkreiserfs(8), reiserfstune(8) resize_reiserfs(8), debugreiserfs(8),
Reiserfsprogs-3.6.19 February 2004 REISERFSCK(8)