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FFSINFO(8)	       DragonFly System Manager's Manual	    FFSINFO(8)

NAME

ffsinfo -- dump all meta information of an existing ufs file system

SYNOPSIS

ffsinfo [-L] [-g cylinder_group] [-i inode] [-l level] [-o outfile] special | file

DESCRIPTION

The ffsinfo utility extends the dumpfs(8) utility. The output is appended to 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 option 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. By default output goes to stdout.

EXAMPLES

ffsinfo -l 1023 /dev/vinum/testvol will dump /dev/vinum/testvol with all available information.

SEE ALSO

disklabel(8), dumpfs(8), fsck(8), growfs(8), newfs(8), tunefs(8), vinum(8)

HISTORY

The ffsinfo utility first appeared in FreeBSD 4.4.

AUTHORS

Christoph Herrmann <chm@FreeBSD.org> Thomas-Henning von Kamptz <tomsoft@FreeBSD.org> The GROWFS team <growfs@Tomsoft.COM>

BUGS

Dumping a mounted filesystem will work, but may produce data which is not completely synchronized. DragonFly 4.1 September 8, 2000 DragonFly 4.1