REISERFSCK(8)                                       REISERFSCK(8)

NAME
       reiserfsck - check a Linux Reiserfs file system

SYNOPSIS
       reiserfsck  [  -afprVy ] [ --rebuild-sb | --check | --fix-
       fixable | --rebuild-tree | --clean-attributes  ]  [  -j  |
       --journal device ] [ -z | --adjust-size ] [ -n | --nolog ]
       [ -l | --logfile file ] [ -q | --quiet ] [ -y | --yes ]  [
       -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 the device  or
              partition  (e.g /dev/hdXX for IDE disk partition or
              /dev/sdXX for 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 reis
              erfs  file system" and you are sure that a Reiserfs
              file system is there.

       --check
              This default action checks file system  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 sys
              tem  tree  (--rebuild-tree). Normally you only need
              this option if the --check option reports  "corrup
              tion  that  can  be fixed with --fix-fixable". This
              includes: zeroing invalid data-block pointers, cor
              recting  st_size and st_blocks for directories, and
              deleting invalid directory entries.

       --rebuild-tree
              This option rebuilds the entire  file  system  tree
              using leaf nodes found on the device.  Normally you
              only need this option if the --check option reports
              "corruption   that   can   be   fixed  only  during
              --rebuild-tree".  You are  strongly  encouraged  to
              make  a  backup  copy of the whole partition before
              attempting the --rebuild-tree option.

       --clean-attributes
              This option cleans  reserved  fields  of  Stat-Data
              items.

       --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 discov
              ered 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.

       --logfile file, -l  file
              This option causes reiserfsck to report any corrup
              tion it finds to the specified log file rather than
              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, assuming yes. 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  file
              system,  check if error flags in the superblock are
              set and  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  cor
              ruption  is found set in the superblock, then reis
              erfsck finishes with an error.

       -V     This option prints the  reiserfsprogs  version  and
              exit.

       -r, -f These options 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, not only used space on the partition.

EXAMPLE OF USING
       1. You think something may be wrong with a reiserfs parti
       tion  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  --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 and we will try
       to help solve the problem.

EXIT CODES
       reiserfsck uses the following exit codes:
          0 - No errors.
          1 - File system errors corrected.
          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
       There  are  likely  to be some bugs. Please report bugs to
       the ReiserFS mail-list <reiserfs-list@namesys.com>.

TODO
       Faster recovering, signal handling,  i/o  error  handling,
       etc.

SEE ALSO
       mkreiserfs(8),  reiserfstune(8)  resize_reiserfs(8), debu
       greiserfs(8),

Reiserfsprogs-3.6.9         April 2003              REISERFSCK(8)