NAME | SYNOPSIS | DESCRIPTION | OPTIONS | BUGS | AUTHOR | AVAILABILITY | SEE ALSO | COLOPHON

DUMPE2FS(8)                System Manager's Manual               DUMPE2FS(8)

NAME         top

       dumpe2fs - dump ext2/ext3/ext4 filesystem information

SYNOPSIS         top

       dumpe2fs [ -bfghixV ] [ -o superblock=superblock ] [ -o
       blocksize=blocksize ] device

DESCRIPTION         top

       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.

OPTIONS         top

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

       -o superblock=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.

       -o blocksize=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).

       -g     display the group descriptor information in a machine readable
              colon-separated value format.  The fields displayed are the
              group number; the number of the first block in the group; the
              superblock location (or -1 if not present); the range of
              blocks used by the group descriptors (or -1 if not present);
              the block bitmap location; the inode bitmap location; and the
              range of blocks used by the inode table.

       -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.

BUGS         top

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

AUTHOR         top

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

AVAILABILITY         top

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

SEE ALSO         top

       e2fsck(8), mke2fs(8), tune2fs(8).  ext4(5)

COLOPHON         top

       This page is part of the e2fsprogs (utilities for ext2/3/4
       filesystems) project.  Information about the project can be found at
       ⟨http://e2fsprogs.sourceforge.net/⟩.  It is not known how to report
       bugs for this man page; if you know, please send a mail to
       man-pages@man7.org.  This page was obtained from the project's
       upstream Git repository 
       ⟨git://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git⟩ on 2017-05-03.
       If you discover any rendering problems in this HTML version of the
       page, or you believe there is a better or more up-to-date source for
       the page, or you have corrections or improvements to the information
       in this COLOPHON (which is not part of the original manual page),
       send a mail to man-pages@man7.org

E2fsprogs version 1.43.5-WIP    February 2017                    DUMPE2FS(8)

Pages that refer to this page: ext4(5)badblocks(8)debugfs(8)e2freefrag(8)e2fsck(8)e2image(8)mke2fs(8)tune2fs(8)