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April, 26th. 2006:
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DUMPE2FS
Section: Maintenance Commands (8) Updated: August 2017 Index
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NAME
dumpe2fs - dump ext2/ext3/ext4 filesystem information
SYNOPSIS
dumpe2fs
[
-bfghixV
]
[
-o superblock=superblock
]
[
-o blocksize=blocksize
]
device
DESCRIPTION
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
- -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
You need to know the physical filesystem structure to understand the
output.
AUTHOR
dumpe2fs
was written by Remy Card < Remy.Card@linux.org>. It is currently being
maintained by Theodore Ts'o < tytso@alum.mit.edu>.
AVAILABILITY
dumpe2fs
is part of the e2fsprogs package and is available from
http://e2fsprogs.sourceforge.net.
SEE ALSO
e2fsck(8),
mke2fs(8),
tune2fs(8).
ext4(5)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- OPTIONS
-
- BUGS
-
- AUTHOR
-
- AVAILABILITY
-
- SEE ALSO
-
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