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REISERFSCK(8)							 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 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  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.

       --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  "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
	      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 cor‐
	      ruption.

       --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
	      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)  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
	      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-devel@vger.ker‐
       nel.org>, 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-3.6.24		 January 2009			 REISERFSCK(8)
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