NetBSD-5.0.2/usr.sbin/dumpfs/dumpfs.8

.\"	$NetBSD: dumpfs.8,v 1.18 2004/01/03 21:05:21 wiz Exp $
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.\"     @(#)dumpfs.8	8.1 (Berkeley) 6/5/93
.\"
.Dd January 3, 2004
.Dt DUMPFS 8
.Os
.Sh NAME
.Nm dumpfs
.Nd dump file system information
.Sh SYNOPSIS
.Nm
.Op Fl acFimsv
.Ar filesys No \&| Ar device
.Op Ar ...
.Sh DESCRIPTION
.Nm
prints out detailed information about the specified filesystems.
.Pp
Options:
.Bl -tag -width Ds
.It Fl a
Print details from each alternate superblock.
.It Fl c
Print details of each cylinder group.
.It Fl F
Dump a file system image from a file, not a special device.
.It Fl i
Print details of each allocated inode.
.It Fl m
Print details of the cylinder group summary.
.It Fl s
Print details of the superblock.
.It Fl v
Be even more verbose.
.El
.Pp
If none of
.Fl a ,
.Fl c ,
.Fl i ,
.Fl m ,
or
.Fl s
are given, then
.Nm
defaults to
.Fl cmsv .
.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 is output by
.Nm
.Fl s .
.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 .
The
.Fl a ,
.Fl c ,
.Fl i ,
.Fl m ,
and
.Fl s
options, and the inode dump were added for
.Nx 2.0 .