2 .\" Copyright 1993, 1994, 1995 by Theodore Ts'o. All Rights Reserved.
3 .\" This file may be copied under the terms of the GNU Public License.
5 .TH DUMPE2FS 8 "@E2FSPROGS_MONTH@ @E2FSPROGS_YEAR@" "E2fsprogs version @E2FSPROGS_VERSION@"
7 dumpe2fs \- dump ext2/ext3/ext4 file system information
14 .B \-o superblock=\fIsuperblock
17 .B \-o blocksize=\fIblocksize
22 prints the super block and blocks group information for the file system
27 When used with a mounted file system, the printed
28 information may be old or inconsistent.
32 print the blocks which are reserved as bad in the file system.
34 .B \-o superblock=\fIsuperblock
37 when examining the file system.
38 This option is not usually needed except by a file system wizard who
39 is examining the remains of a very badly corrupted file system.
41 .B \-o blocksize=\fIblocksize
44 bytes when examining the file system.
45 This option is not usually needed except by a file system wizard who
46 is examining the remains of a very badly corrupted file system.
49 force dumpe2fs to display a file system even though it may have some
50 file system feature flags which dumpe2fs may not understand (and which
51 can cause some of dumpe2fs's display to be suspect).
54 display the group descriptor information in a machine readable colon-separated
55 value format. The fields displayed are the group number; the number of the
56 first block in the group; the superblock location (or -1 if not present); the
57 range of blocks used by the group descriptors (or -1 if not present); the block
58 bitmap location; the inode bitmap location; and the range of blocks used by the
62 only display the superblock information and not any of the block
63 group descriptor detail information.
66 display the file system data from an image file created by
70 as the pathname to the image file.
75 feature is enabled on the file system, check if
77 is in use by another node, see
79 for full details. If used together with the
81 option, only the MMP block information is printed.
84 print the detailed group information block numbers in hexadecimal format
87 print the version number of
92 exits with a return code of 0 if the operation completed without errors.
93 It will exit with a non-zero return code if there are any errors, such
94 as problems reading a valid superblock, bad checksums, or if the device
95 is in use by another node and
99 You may need to know the physical file system structure to understand the
103 was written by Remy Card <Remy.Card@linux.org>. It is currently being
104 maintained by Theodore Ts'o <tytso@alum.mit.edu>.
107 is part of the e2fsprogs package and is available from
108 http://e2fsprogs.sourceforge.net.