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 Berkeleys 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 corupted 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 corupted 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 dumpe2fss 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 Tso <firstname.lastname@example.org>.
dumpe2fs is part of the e2fsprogs package and is available from http://e2fsprogs.sourceforge.net.
e2fsck(8), mke2fs(8), tune2fs(8)
|E2fsprogs version 1.35||DUMPE2FS (8)||February 2004|