man--dumpe2fs

DUMPE2FS(8)                                                        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.

       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 filesystem.

       -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 descrip-
              tor 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 <[email protected]>.  It is currently being  main-
       tained by Theodore Ts’o <[email protected]>.

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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