FSINFO(8) BSD System Manager's Manual FSINFO(8)NAMEffsinfo - dump all meta information of an existing ufs file system
SYNOPSISffsinfo [-L] [-g cylinder_group] [-i inode] [-l level] [-o outfile]
special | file
DESCRIPTION
The ffsinfo utility extends the dumpfs(8) utility.
The output is generated into the file outfile. Also expect the output
file to be rather large. Up to 2 percent of the size of the specified
file system is not uncommon.
The following options are available:
-L Specifying this option skips the tests of the disklabel. This is
done automatically, if the specified filename to dump is a plain
file.
-g cylinder_group
This restricts the dump to information about this cylinder group
only. Here 0 means the first cylinder group and -1 the last one.
-i inode
This restricts the dump to information about this particular
inode only. Here the minimum acceptable inode is 2. If this op-
tion is omitted but a cylinder group is defined then only inodes
within that cylinder group are dumped.
-l level
The level of detail which will be dumped. This value defaults to
255 and is the "bitwise or" of the following table:
0x001 initial superblock
0x002 superblock copies in each cylinder group
0x004 cylinder group summary in initial cylinder group
0x008 cylinder group information
0x010 inode allocation bitmap
0x020 fragment allocation bitmap
0x040 cluster maps and summary
0x080 rotational layout tables
0x100 inode information
0x200 indirect block dump
-o outfile
This allows to change the output filename where the dump is writ-
ten to. The current default is /var/tmp/ffsinfo. If - is provid-
ed, output will be sent to stdout.
EXAMPLESffsinfo-l 1023 /dev/rwd0f
will dump /dev/rwd0f with all available information.
BUGS
Currently ffsinfo can only dump unmounted file systems. Do not try dump-
ing a mounted file system, your system may panic and you will not be able
to use the file system any longer.
Also snapshots are handled like plain files. They should get their own
level to provide for independent control of the amount of what gets
dumped. It probably also makes sense to some extend to dump the snapshot
as a file system.
SEE ALSOdisklabel(8), dumpfs(8), fsck(8), growfs(8), newfs(8), tunefs(8)AUTHORS
Christoph Herrmann <chm@FreeBSD.org>
Thomas-Henning von Kamptz <tomsoft@FreeBSD.org>
The GROWFS team <growfs@Tomsoft.COM>
HISTORY
The ffsinfo utility first appeared in FreeBSD 4.4.
MirOS BSD #10-current September 8, 2000 1