dumpe2fs [ -bfghixV ] [ -o superblock=superblock ] [ -o blocksize=blocksize ] device
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.
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 <email@example.com>.
dumpe2fs is part of the e2fsprogs package and is available from http://e2fsprogs.sourceforge.net.
e2fsck(8), mke2fs(8), tune2fs(8). ext4(5)