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
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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
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37 .\" $TSHeader: src/sbin/ffsinfo/ffsinfo.8,v 1.3 2000/12/12 19:30:55 tomsoft Exp $
45 .Nd "dump all meta information of an existing ufs file system"
48 .Op Fl g Ar cylinder_group
60 The output is appended to the file
62 Also expect the output file to be rather large.
63 Up to 2 percent of the size of the specified file system is not uncommon.
65 The following options are available:
66 .Bl -tag -width indent
67 .It Fl g Ar cylinder_group
68 This restricts the dump to information about this cylinder group only.
71 means the first cylinder group and
75 This restricts the dump to information about this particular inode only.
76 Here the minimum acceptable inode is
78 If this option is omitted but a cylinder group is defined then only inodes
79 within that cylinder group are dumped.
81 The level of detail which will be dumped.
82 This value defaults to
86 of the following table:
88 .Bl -hang -width indent -compact
92 superblock copies in each cylinder group
94 cylinder group summary in initial cylinder group
96 cylinder group information
98 inode allocation bitmap
100 fragment allocation bitmap
102 cluster maps and summary
109 This sets the output filename where the dump is written to, and
113 is provided, output will be sent to stdout.
116 .Dl ffsinfo -o /var/tmp/ffsinfo -l 1023 /dev/vinum/testvol
119 .Pa /dev/vinum/testvol
122 with all available information.
134 utility first appeared in
137 .An Christoph Herrmann Aq chm@FreeBSD.org
138 .An Thomas-Henning von Kamptz Aq tomsoft@FreeBSD.org
139 .An The GROWFS team Aq growfs@Tomsoft.COM
141 Snapshots are handled like plain files.
142 They should get their own level to provide for independent control of the
143 amount of what gets dumped.
144 It probably also makes sense to some extend to dump the snapshot as a