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
       inconsistent.

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 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@linux.org>.  It is currently 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).  ext4(5)