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debugreiserfs(8)


NAME

   debugreiserfs - The debugging tool for the ReiserFS filesystem.

SYNOPSIS

   debugreiserfs [ -dDJmoqpuSV ] [ -j device ] [ -B file ] [ -1 N ]

   device

DESCRIPTION

   debugreiserfs   sometimes   helps   to  solve  problems  with  reiserfs
   filesystems.  When run without options it prints the super block of the
   ReiserFS filesystem found on the device.

   device is  the  special file corresponding to the device (e.g /dev/hdXX
          for  an  IDE  disk  partition  or  /dev/sdXX  for  a  SCSI  disk
          partition).

OPTIONS

   -j device
          prints  the  contents of the journal. The option -p allows it to
          pack the journal with other metadata into the archive.

   -J     prints the journal header.

   -d     prints  the  formatted  nodes  of  the  internal  tree  of   the
          filesystem.

   -D     prints the formatted nodes of all used blocks of the filesystem.

   -m     prints the contents of the bitmap (slightly useful).

   -o     prints the objectid map (slightly useful).

   -B file
          takes  the  list  of  bad blocks stored in the internal ReiserFS
          tree and translates  it  into  an  ascii  list  written  to  the
          specified file.

   -1 blocknumber
          prints the specified block of the filesystem.

   -p     extracts   the   filesystem's  metadata  with  debugreiserfs  -p
          /dev/xxx | gzip -c > xxx.gz. None of your data are packed unless
          a  filesystem  corruption  presents  when the whole block having
          this corruption is packed. You send us the output, and we use it
          to  create  a  filesystem  with the same strucure as yours using
          debugreiserfs -u.  When the data file is  not  too  large,  this
          usually allows us to quickly reproduce and debug the problem.

   -u     builds  the  ReiserFS  filesystem  image with gunzip -c xxx.gz |
          debugreiserfs -u /dev/image of the  previously  packed  metadata
          with  debugreiserfs  -p. The result image is not the same as the
          original filesystem, because mostly only  metadata  were  packed
          with   debugreiserfs   -p,   but  the  filesystem  structure  is
          completely recreated.

   -S     When -S is not specified -p deals with blocks marked used in the
          filesystem  bitmap only. With this option set debugreiserfs will
          work with the entire device.

   -q     When -p is in use, suppress showing the speed of progress.

AUTHOR

   This version of  debugreiserfs  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; check the
   syslog file for any related information.

SEE ALSO

   reiserfsck(8), mkreiserfs(8)



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