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FFSINFO

FFSINFO

Section: Maintenance Commands (8)
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NAME

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

SYNOPSIS

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

DESCRIPTION

The 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.  

SEE ALSO

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

HISTORY

The utility first appeared in Fx 4.4 .  

AUTHORS

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

BUGS

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.


 

Index

NAME
SYNOPSIS
DESCRIPTION
EXAMPLES
SEE ALSO
HISTORY
AUTHORS
BUGS

This document was created by man2html, using the manual pages.
Time: 22:01:38 GMT, April 16, 2011