From Linux Man Pages
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 debu-
greiserfs -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.
BUGS
Please report bugs to the ReiserFS developers <reiserfs-dev@namesys.com>, providing as much information as possi-
ble--your hardware, kernel, patches, settings, all printed messages; check the syslog file for any related infor-
mation.
RELATED
reiserfsck(8), mkreiserfs(8)
CATEGORY