dumpe2fs - dump ext2/ext3 filesystem information

dumpe2fs [ -bfhixV ] [ -ob superblock ] [ -oB blocksize ] device

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.

-b

print the blocks which are reserved as bad in the filesystem.

-ob 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.

-oB 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.

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

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

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

e2fsck(8), mke2fs(8), tune2fs(8)