1 .\" Copyright (c) 2000 Christoph Herrmann, Thomas-Henning von Kamptz
2 .\" Copyright (c) 1980, 1989, 1993 The Regents of the University of California.
3 .\" All rights reserved.
5 .\" This code is derived from software contributed to Berkeley by
6 .\" Christoph Herrmann and Thomas-Henning von Kamptz, Munich and Frankfurt.
8 .\" Redistribution and use in source and binary forms, with or without
9 .\" modification, are permitted provided that the following conditions
11 .\" 1. Redistributions of source code must retain the above copyright
12 .\" notice, this list of conditions and the following disclaimer.
13 .\" 2. Redistributions in binary form must reproduce the above copyright
14 .\" notice, this list of conditions and the following disclaimer in the
15 .\" documentation and/or other materials provided with the distribution.
16 .\" 3. All advertising materials mentioning features or use of this software
17 .\" must display the following acknowledgment:
18 .\" This product includes software developed by the University of
19 .\" California, Berkeley and its contributors, as well as Christoph
20 .\" Herrmann and Thomas-Henning von Kamptz.
21 .\" 4. Neither the name of the University nor the names of its contributors
22 .\" may be used to endorse or promote products derived from this software
23 .\" without specific prior written permission.
25 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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37 .\" $TSHeader: src/sbin/ffsinfo/ffsinfo.8,v 1.3 2000/12/12 19:30:55 tomsoft Exp $
38 .\" $FreeBSD: /repoman/r/ncvs/src/sbin/ffsinfo/ffsinfo.8,v 1.6.2.6 2004/01/29 15:48:26 cperciva Exp $
45 .Nd "dump all meta information of an existing ufs file system"
49 .Op Fl g Ar cylinder_group
61 The output is appended to the file
63 Also expect the output file to be rather large.
64 Up to 2 percent of the size of the specified file system is not uncommon.
66 The following options are available:
67 .Bl -tag -width indent
69 Specifying this option skips the tests of the disklabel.
70 This is done automatically, if the specified filename to dump is a plain file.
71 .It Fl g Ar cylinder_group
72 This restricts the dump to information about this cylinder group only.
75 means the first cylinder group and
79 This restricts the dump to information about this particular inode only.
80 Here the minimum acceptable inode is
82 If this option is omitted but a cylinder group is defined then only inodes
83 within that cylinder group are dumped.
85 The level of detail which will be dumped.
86 This value defaults to
90 of the following table:
92 .Bl -hang -width indent -compact
96 superblock copies in each cylinder group
98 cylinder group summary in initial cylinder group
100 cylinder group information
102 inode allocation bitmap
104 fragment allocation bitmap
106 cluster maps and summary
108 rotational layout tables
115 This allows to change the output filename where the dump is written to.
116 By default output goes to stdout.
119 .Dl ffsinfo -l 1023 /dev/vinum/testvol
122 .Pa /dev/vinum/testvol
123 with all available information.
135 utility first appeared in
138 .An Christoph Herrmann Aq Mt chm@FreeBSD.org
139 .An Thomas-Henning von Kamptz Aq Mt tomsoft@FreeBSD.org
140 .An The GROWFS team Aq Mt growfs@Tomsoft.COM
142 Dumping a mounted filesystem will work, but may produce data which is
143 not completely synchronized.