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.