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

NAME
     dumpfs -- dump file system	information

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

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

     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	-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		       January 28, 2009			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY

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