dumpe2fs(8)

1DUMPE2FS(8)                 System Manager's Manual                DUMPE2FS(8)
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NAME

6       dumpe2fs - dump ext2/ext3/ext4 filesystem information
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SYNOPSIS

9       dumpe2fs [ -bfhixV ] [ -o superblock=superblock ] [ -o blocksize=block‐
10       size ] device
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DESCRIPTION

13       dumpe2fs prints the super block and blocks group  information  for  the
14       filesystem present on device.
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16       dumpe2fs  is similar to Berkeley's dumpfs program for the BSD Fast File
17       System.
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OPTIONS

20       -b     print the blocks which are reserved as bad in the filesystem.
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22       -o superblock=superblock
23              use the block superblock when examining  the  filesystem.   This
24              option  is  not usually needed except by a filesystem wizard who
25              is examining the remains of a very badly corrupted filesystem.
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27       -o blocksize=blocksize
28              use blocks of blocksize bytes  when  examining  the  filesystem.
29              This  option is not usually needed except by a filesystem wizard
30              who is examining the remains of a very badly corrupted  filesys‐
31              tem.
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33       -f     force  dumpe2fs  to display a filesystem even though it may have
34              some filesystem feature flags which dumpe2fs may not  understand
35              (and which can cause some of dumpe2fs's display to be suspect).
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37       -h     only display the superblock information and not any of the block
38              group descriptor detail information.
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40       -i     display the filesystem  data  from  an  image  file  created  by
41              e2image, using device as the pathname to the image file.
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43       -x     print  the detailed group information block numbers in hexadeci‐
44              mal format
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46       -V     print the version number of dumpe2fs and exit.
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BUGS

49       You need to know the physical filesystem structure  to  understand  the
50       output.
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AUTHOR

53       dumpe2fs  was  written  by Remy Card <Remy.Card@linux.org>.  It is cur‐
54       rently being maintained by Theodore Ts'o <tytso@alum.mit.edu>.
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AVAILABILITY

57       dumpe2fs is part  of  the  e2fsprogs  package  and  is  available  from
58       http://e2fsprogs.sourceforge.net.
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