DEBUGREISERFS(8)                     System Manager's Manual                     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 with‐
       out 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 par‐
              tition 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 repro‐
              duce 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 AT namesys.com>.

BUGS
       Please report bugs to the ReiserFS developers <reiserfs-devel AT vger.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)



Reiserfsprogs 3.6.24                       January 2009                          DEBUGREISERFS(8)