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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