dumpe2fs man page on aLinux

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DUMPE2FS(8)							   DUMPE2FS(8)

NAME
       dumpe2fs - dump ext2/ext3/ext4 filesystem information

SYNOPSIS
       dumpe2fs [ -bfhixV ] [ -o superblock=superblock ] [ -o blocksize=block‐
       size ] device

DESCRIPTION
       dumpe2fs prints the super block and blocks group	 information  for  the
       filesystem present on device.

       dumpe2fs	 is similar to Berkeley's dumpfs program for the BSD Fast File
       System.

OPTIONS
       -b     print the blocks which are reserved as bad in the filesystem.

       -o superblock=superblock
	      use the block superblock when examining  the  filesystem.	  This
	      option  is  not usually needed except by a filesystem wizard who
	      is examining the remains of a very badly corrupted filesystem.

       -o blocksize=blocksize
	      use blocks of blocksize bytes  when  examining  the  filesystem.
	      This  option is not usually needed except by a filesystem wizard
	      who is examining the remains of a very badly corrupted  filesys‐
	      tem.

       -f     force  dumpe2fs  to display a filesystem even though it may have
	      some filesystem feature flags which dumpe2fs may not  understand
	      (and which can cause some of dumpe2fs's display to be suspect).

       -h     only display the superblock information and not any of the block
	      group descriptor detail information.

       -i     display the filesystem  data  from  an  image  file  created  by
	      e2image, using device as the pathname to the image file.

       -x     print  the detailed group information block numbers in hexadeci‐
	      mal format

       -V     print the version number of dumpe2fs and exit.

BUGS
       You need to know the physical filesystem structure  to  understand  the
       output.

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

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

SEE ALSO
       e2fsck(8), mke2fs(8), tune2fs(8)

E2fsprogs version 1.41.12	   May 2010			   DUMPE2FS(8)
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