debugreiserfs

DEBUGREISERFS(8)                                              DEBUGREISERFS(8)



NAME
       debugreiserfs

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

       device

DESCRIPTION
       It  helps  sometimes to solve problems with reiserfs filesystems. Being
       called w/o 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@idiom.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)



Reiserfsprogs 3.6.4              January 2002                 DEBUGREISERFS(8)