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)

Reiserfsprogs 3.6.27                              January 2009                                  DEBUGREISERFS(8)