misc/dumpe2fs.8.in

   1 .\" -*- nroff -*-
   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.
   4 .\"
   5 .TH DUMPE2FS 8 "@E2FSPROGS_MONTH@ @E2FSPROGS_YEAR@" "E2fsprogs version @E2FSPROGS_VERSION@"
   6 .SH NAME
   7 dumpe2fs \- dump ext2/ext3/ext4 filesystem information
   8 .SH SYNOPSIS
   9 .B dumpe2fs
  10 [
  11 .B \-bfghixV
  12 ]
  13 [
  14 .B \-o superblock=\fIsuperblock
  15 ]
  16 [
  17 .B \-o blocksize=\fIblocksize
  18 ]
  19 .I device
  20 .SH DESCRIPTION
  21 .B dumpe2fs
  22 prints the super block and blocks group information for the filesystem
  23 present on
  24 .I device.
  25 .PP
  26 .B Note:
  27 When used with a mounted filesystem, the printed
  28 information may be old or inconsistent.
  29 .SH OPTIONS
  30 .TP
  31 .B \-b
  32 print the blocks which are reserved as bad in the filesystem.
  33 .TP
  34 .B \-o superblock=\fIsuperblock
  35 use the block
  36 .I superblock
  37 when examining the filesystem.
  38 This option is not usually needed except by a filesystem wizard who
  39 is examining the remains of a very badly corrupted filesystem.
  40 .TP
  41 .B \-o blocksize=\fIblocksize
  42 use blocks of
  43 .I blocksize
  44 bytes when examining the filesystem.
  45 This option is not usually needed except by a filesystem wizard who
  46 is examining the remains of a very badly corrupted filesystem.
  47 .TP
  48 .B \-f
  49 force dumpe2fs to display a filesystem even though it may have some
  50 filesystem feature flags which dumpe2fs may not understand (and which
  51 can cause some of dumpe2fs's display to be suspect).
  52 .TP
  53 .B \-g
  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
  59 inode table.
  60 .TP
  61 .B \-h
  62 only display the superblock information and not any of the block
  63 group descriptor detail information.
  64 .TP
  65 .B \-i
  66 display the filesystem data from an image file created by
  67 .BR e2image ,
  68 using
  69 .I device
  70 as the pathname to the image file.
  71 .TP
  72 .B \-x
  73 print the detailed group information block numbers in hexadecimal format
  74 .TP
  75 .B \-V
  76 print the version number of
  77 .B dumpe2fs
  78 and exit.
  79 .SH BUGS
  80 You need to know the physical filesystem structure to understand the
  81 output.
  82 .SH AUTHOR
  83 .B dumpe2fs
  84 was written by Remy Card <Remy.Card@linux.org>.  It is currently being
  85 maintained by Theodore Ts'o <tytso@alum.mit.edu>.
  86 .SH AVAILABILITY
  87 .B dumpe2fs
  88 is part of the e2fsprogs package and is available from
  89 http://e2fsprogs.sourceforge.net.
  90 .SH SEE ALSO
  91 .BR e2fsck (8),
  92 .BR mke2fs (8),
  93 .BR tune2fs (8).
  94 .BR ext4 (5)
  95