ffsinfo8
Dump all meta information of an existing ufs file system
Usage
ffsinfo {[-g
cylinder_group]
[-i
inode]
[-l
level]
[-o
outfile]
special | file}
Overview
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:
-
-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
- 0x100
-
inode information
- 0x200
-
indirect block dump
-
-o outfile -
This sets the output filename where the dump is written to, and must be specified. If
-is provided, output will be sent to stdout.
Examples
ffsinfo -o /var/tmp/ffsinfo -l 1023 /dev/vinum/testvol
will dump /dev/vinum/testvol to /var/tmp/ffsinfo with all available information.
Releases
2 releases since Debian 6.0 (Squeeze); the text changed 1 time.