debugreiserfs

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 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)