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



NAME
       dumpe2fs - dump ext2/ext3/ext4 filesystem information

SYNOPSIS
       dumpe2fs [ -bfhixV ] [ -o superblock=superblock ] [ -o blocksize=blocksize ] device

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

       Note: When used with a mounted filesystem, the printed information may be old or inconsis‐
       tent.

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 filesystem.

       -f     force dumpe2fs to display a filesystem even though it may have some filesystem fea‐
              ture 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 hexadecimal 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 AT linux.org>.  It is currently being maintained
       by Theodore Ts'o <tytso AT alum.edu>.

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

SEE ALSO
       e2fsck(8), mke2fs(8), tune2fs(8).  ext4(5)




E2fsprogs version 1.42.12                  August 2014                                DUMPE2FS(8)