debugreiserfs(8) - phpMan

DEBUGREISERFS(8) 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 structure 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-dev AT namesys.com>, providing as
much information as possible--your hardware, kernel, patches, settings, all printed mes-
sages; check the syslog file for any related information.