ffsinfo man page on DragonFly

ffsinfo man page on DragonFly

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FFSINFO(8)		  BSD 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.

BSD			       September 8, 2000			   BSD

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