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
          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).
          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
          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
          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 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.kernel.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),





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