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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 Reis-
erFS 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 filesys-
tem 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 debu-
greiserfs -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-dev@namesys.com>, 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 3.6.21 January 2009 DEBUGREISERFS(8)
