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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 3.5                  September 8, 2000                 DragonFly 3.5

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