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DUMPFS(8)		FreeBSD	System Manager's Manual		     DUMPFS(8)

NAME
     dumpfs -- dump UFS	file system information

SYNOPSIS
     dumpfs [-f] [-l] [-m] filesys | device

DESCRIPTION
     The dumpfs	utility	prints out the UFS super block and cylinder group
     information for the file system or	special	device specified, unless the
     -f, -l or -m flag is specified.  The listing is very long and detailed.
     This command is useful mostly for finding out certain file	system infor-
     mation such as the	file system block size and minimum free	space percent-
     age.

     If	-f is specified, a sorted list of all free fragments and free fragment
     ranges, as	represented in cylinder	group block free lists,	is printed.
     If	the flag is specified twice, contiguous	free fragments are not col-
     lapsed into ranges	and instead printed in a simple	list.  Fragment	num-
     bers may be converted to raw byte offsets by multiplying by the fragment
     size, which may be	useful when recovering deleted data.

     If	-l is specified, the pathname to the file system's container derived
     from its unique identifier	is printed.

     If	-m is specified, a newfs(8) command is printed that can	be used	to
     generate a	new file system	with equivalent	settings.

SEE ALSO
     disktab(5), fs(5),	disklabel(8), fsck(8), newfs(8), tunefs(8)

HISTORY
     The dumpfs	utility	appeared in 4.2BSD.

FreeBSD	10.1			 Jul 14, 2011			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY

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