1DEBUGREISERFS(8)            System Manager's Manual           DEBUGREISERFS(8)
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NAME

6       debugreiserfs - The debugging tool for the ReiserFS filesystem.
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SYNOPSIS

9       debugreiserfs [ -dDJmoqpuSV ] [ -j device ] [ -B file ] [ -1 N ]
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11       device
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DESCRIPTION

14       debugreiserfs  sometimes helps to solve problems with reiserfs filesys‐
15       tems.  When run without options it prints the super block of the  Reis‐
16       erFS filesystem found on the device.
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18       device is  the  special file corresponding to the device (e.g /dev/hdXX
19              for an IDE disk partition or /dev/sdXX for a  SCSI  disk  parti‐
20              tion).
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OPTIONS

23       -j device
24              prints  the  contents of the journal. The option -p allows it to
25              pack the journal with other metadata into the archive.
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27       -J     prints the journal header.
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29       -d     prints the formatted nodes of the internal tree of the  filesys‐
30              tem.
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32       -D     prints the formatted nodes of all used blocks of the filesystem.
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34       -m     prints the contents of the bitmap (slightly useful).
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36       -o     prints the objectid map (slightly useful).
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38       -B file
39              takes  the  list  of  bad blocks stored in the internal ReiserFS
40              tree and translates it into an ascii list written to the  speci‐
41              fied file.
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43       -1 blocknumber
44              prints the specified block of the filesystem.
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46       -p     extracts   the   filesystem's  metadata  with  debugreiserfs  -p
47              /dev/xxx | gzip -c > xxx.gz. None of your data are packed unless
48              a  filesystem  corruption  presents  when the whole block having
49              this corruption is packed. You send us the output, and we use it
50              to  create  a  filesystem  with the same strucure as yours using
51              debugreiserfs -u.  When the data file is  not  too  large,  this
52              usually allows us to quickly reproduce and debug the problem.
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54       -u     builds  the  ReiserFS  filesystem  image with gunzip -c xxx.gz |
55              debugreiserfs -u /dev/image of the  previously  packed  metadata
56              with  debugreiserfs  -p. The result image is not the same as the
57              original filesystem, because mostly only  metadata  were  packed
58              with  debugreiserfs  -p,  but  the  filesystem structure is com‐
59              pletely recreated.
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61       -S     When -S is not specified -p deals with blocks marked used in the
62              filesystem  bitmap only. With this option set debugreiserfs will
63              work with the entire device.
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65       -q     When -p is in use, suppress showing the speed of progress.
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AUTHOR

68       This version of  debugreiserfs  has  been  written  by  Vitaly  Fertman
69       <vitaly@namesys.com>.
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BUGS

72       Please report bugs to the ReiserFS developers <reiserfs-devel@vger.ker‐
73       nel.org>, providing as much  information  as  possible--your  hardware,
74       kernel,  patches, settings, all printed messages; check the syslog file
75       for any related information.
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SEE ALSO

78       reiserfsck(8), mkreiserfs(8)
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82Reiserfsprogs 3.6.27             January 2009                 DEBUGREISERFS(8)
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