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.\" @(#)dumpfs.8 8.1 (Berkeley) 6/5/93
.\" $FreeBSD$
.\"
.Dd January 19, 2003
.Dt DUMPFS 8
.Os
.Sh NAME
.Nm dumpfs
.Nd dump file system information
.Sh SYNOPSIS
.Nm
.Op Fl m
.Op Ar filesys No \&| Ar device
.Sh DESCRIPTION
The
.Nm
utility prints out the super block and cylinder group information
for the file system or special device specified, unless
.Fl m
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.
.Pp
If
.Fl m
is specified, the file system is marshalled in terms of a
.Xr newfs 8
command to generate the file system.
.Sh SEE ALSO
.Xr disktab 5 ,
.Xr fs 5 ,
.Xr disklabel 8 ,
.Xr fsck 8 ,
.Xr newfs 8 ,
.Xr tunefs 8
.Sh HISTORY
The
.Nm
utility appeared in
.Bx 4.2 .
