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)