Linux "dumpe2fs" Command Line Options and Examples
dump ext2/ext3/ext4 filesystem information
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..
Usage:
dumpe2fs [ -bfghixV ] [ -o superblock=superblock ] [ -o blocksize=blocksize ] device
Command Line Options:
-b
print the blocks which are reserved as bad in the filesystem.
dumpe2fs -b ...
-o
use the block superblock when examining the filesystem. This option is not usually needed except by a filesystem wizard whois examining the remains of a very badly corrupted filesystem.
dumpe2fs -o ...
-h
only display the superblock information and not any of the block group descriptor detail information.
dumpe2fs -h ...
-i
display the filesystem data from an image file created by e2image, using device as the pathname to the image file.
dumpe2fs -i ...
-x
print the detailed group information block numbers in hexadecimal format
dumpe2fs -x ...
-V
BUGSYou need to know the physical filesystem structure to understand the output.AUTHORdumpe2fs was written by Remy Card <Remy.Card@linux.org>. It is currently being maintained by Theodore Ts'o <tytso@alum.mit.edu>.AVAILABILITYdumpe2fs is part of the e2fsprogs package and is available from http://e2fsprogs.sourceforge.net.
dumpe2fs -V ...