DEBUGREISERFS(8)

NAME
debugreiserfs

SYNOPSIS
debugreiserfs [ -dDJmoqpS ] [ -j device ] [ -B blocknumber ] device

DESCRIPTION
It helps sometimes to solve problems with reiserfs filesystems. Being called without options it prints super block of reiserfs filesystem found on the device.

device
    is the special file corresponding to the device (e.g /dev/hdXX for IDE disk partition or /dev/sdXX for SCSI disk partition).

OPTIONS

-j device
    print contents of journal. Also with the option -p it allows to pack journal into archive with other metadata

-J  print journal header.

-d  print formatted nodes of the internal tree of the filesystem

-D  print formatted nodes of all used blocks of the filesystem

-m  print contents of bitmap (not very useful)

-o  print objectid map (not very useful)

-1 blocknumber
    print specified block of the filesystem

-p  Makes debugreiserfs to find filesystem metadata This option exists to help reiserfsck debugging. If reiserfsck fails - you may extract filesystem metadata with debugreiserfs -p /dev/xxx |gzip -c > xxx.gz. We download that data and make the filesystem similar to your with gunzip -c xxx.gz | unpack /dev/xxx (unpack is included into reiserfsprogs package). This usually allows to reproduce and debug the problem quickly. When data file is not too large.

-S  When -S is not specified -p deals with blocks marked used in the filesystem bitmap. With this option set they will work with whole device.

-q  Suppress showing speed of progress when -p is in use

AUTHOR
This version of debugreiserfs has been written by Hans Reiser <reiser@namesys.com>.

BUGS
There are probably few of them. Please, report bugs to ReiserFS mail-list <reiserfs-list@namesys.com>.

SEE ALSO
reiserfsck(8), mkreiserfs(8)