.\"	$OpenBSD: dumpfs.8,v 1.4 1998/12/15 01:20:29 aaron Exp $
.\"	$NetBSD: dumpfs.8,v 1.8 1997/05/07 23:19:03 lukem Exp $
.\"
.\" Copyright (c) 1983, 1991, 1993
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.\"     @(#)dumpfs.8	8.1 (Berkeley) 6/5/93
.\"
.Dd June 5, 1993
.Dt DUMPFS 8
.Os BSD 4.2
.Sh NAME
.Nm dumpfs
.Nd dump file system information
.Sh SYNOPSIS
.Nm dumpfs
.Op Ar filesys No \&| Ar device
.Sh DESCRIPTION
.Nm
prints out the super block and cylinder group information
for the file system or special device specified.
The listing is very long and detailed.
.Pp
.Nm
is useful mostly for finding out certain file system
information such as the file system block size, minimum
free space percentage, and the file system level that
can be upgraded with the
.Fl c
option of 
.Xr fsck_ffs 8 .
All of this information can be found within the first twenty
lines of the output.
.Sh SEE ALSO
.Xr disktab 5 ,
.Xr fs 5 ,
.Xr disklabel 8 ,
.Xr fsck 8 ,
.Xr fsck_ffs 8 ,
.Xr newfs 8 ,
.Xr tunefs 8
.Sh HISTORY
The
.Nm
command appeared in
.Bx 4.2 .