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Member "reiserfsprogs-3.6.21/debugreiserfs/debugreiserfs.8" of archive reiserfsprogs-3.6.21.tar.gz:
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debugreiserfs - The debugging tool for the ReiserFS filesystem.
debugreiserfs
[ -dDJmoqpuSV ] [ -j device ] [ -B file ] [ -1 N ]
device
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).
- -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 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 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
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.
This
version of debugreiserfs has been written by Vitaly Fertman <vitaly@namesys.com>.
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.
reiserfsck(8), mkreiserfs(8)
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