|This restricts the dump to information about this cylinder group only. Here 0 means the first cylinder group and -1 the last one.|
|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.|
The level of detail which will be dumped.
This value defaults to
and is the
of the following table:
|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|
|0x200||indirect block dump|
This sets the output filename where the dump is written to, and
must be specified.
is provided, output will be sent to stdout.
ffsinfo -o /var/tmp/ffsinfo -l 1023 /dev/vinum/testvol
will dump /dev/vinum/testvol to /var/tmp/ffsinfo with all available information.
The ffsinfo utility first appeared in
.Fx 4.4 .
.An Christoph Herrmann Aq chm@FreeBSD.org
.An Thomas-Henning von Kamptz Aq tomsoft@FreeBSD.org
.An The GROWFS team Aq growfs@Tomsoft.COM
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.