debugreiserfs


SYNOPSIS

       debugreiserfs  [  -jdcmos  ] [ -b blocknumber ] [ -p file­
       name.bmp ] [ -P filename.bmp ] 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     print contents of journal

       -d     print formatted nodes of the filesystem

       -c     print contents of direct items

       -m     print contents of bitmap (not very useful)

       -o     print objectid map (not very useful)

       -s     scans the partition and prints a line when any kind
              of reiserfs formatted nodes found

       -b blocknumber
              print specified block of the filesystem

       -p filename
              -P filename

              Makes  debugreiserfs  to  find  filesystem metadata
              These exist to help reiserfsck debugging. If  reis­
              erfsck  fails - you may extract filesystem metadata
              with  debugreiserfs -p filename /dev/xxx |gzip -c >
              xxx.gz. We download that data and make the filesys­
              tem 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.  -P will cause   debugreiserfs  to  find
              and  pack metadata from all the device whereas with
              -p it will only go through blocks  marked  used  in
              filesystem bitmaps


AUTHOR

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

       There are probably few of them.  Please,  report  bugs  to
       Hans Reiser <reiser@idiom.com>.


SEE ALSO

       reiserfsck(8), mkreiserfs(8)


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