FSINFO(8) MidnightBSD System Manager’s Manual FSINFO(8)
ffsinfo — dump all meta information of an existing ufs file system
ffsinfo [−g cylinder_group] [−i inode] [−l level] [−o outfile] special | file
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:
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 255 and is the ‘‘bitwise or’’ of the following table:
superblock copies in each cylinder group
cylinder group summary in initial cylinder group
cylinder group information
inode allocation bitmap
fragment allocation bitmap
cluster maps and summary
indirect block dump
This sets the output filename where the dump is written to, and must be specified. If − 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.
disklabel(8), dumpfs(8), fsck(8), growfs(8), newfs(8), tunefs(8), vinum(8)
The ffsinfo utility first appeared in FreeBSD 4.4.
Thomas-Henning von Kamptz 〈tomsoft@FreeBSD.org〉
The GROWFS team 〈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.
MidnightBSD 0.3 September 8, 2000 MidnightBSD 0.3