REISERFSCK(8)						      System Manager's Manual						     REISERFSCK(8)

NAME

       reiserfsck - The checking tool for the ReiserFS filesystem.

SYNOPSIS

       reiserfsck  [  -aprVy  ]  [ --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 ] [ -f | --force ] [ -S  |
       --scan-whole-partition ] [ --no-journal-available ] device

DESCRIPTION

       Reiserfsck  searches  for a Reiserfs filesystem on a device, replays any necessary transactions, and either checks or repairs the file sys-
       tem.

       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 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.

       --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).  Nor-
	      mally  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 "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 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
	      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 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 sep-
	      arate 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 assuem you con-
	      firm. 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 indicating a fatal corruption is found set in the
	      superblock, then reiserfsck finishes with an error.

       --force, -f
	      Force checking even if the file system seems clean.

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

       -r This option does nothing at all; it is provided only for
	      backwards compatibility.

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 including 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@namesys.com>.

BUGS

       Please report bugs to the ReiserFS developers <reiserfs-dev@namesys.com>, providing as much information as possible--your hardware, kernel,
       patches, settings, all printed messages, 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-3.6.21						   January 2009 						     REISERFSCK(8)