debugreiserfs sometimes helps to solve problems with reiserfs filesystems.
When run without 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 partition or /dev/sdXX for a SCSI disk partition).
OPTIONS
-jdevice
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).
-Bfile
takes the list of bad blocks stored in the internal ReiserFS tree and translates it
into an ascii list written to the specified file.
-1blocknumber
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 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 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@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.
