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+.\"	$OpenBSD: vdmtool.8,v 1.1 2013/10/01 20:32:30 miod Exp $
+.\"
+.\" Copyright (c) 2013 Miodrag Vallat.
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: October 1 2013 $
+.Dt VDMTOOL 8 aviion
+.Os
+.Sh NAME
+.Nm vdmtool
+.Nd display or initialize DG/UX disk volume information
+.Sh SYNOPSIS
+.Nm vdmtool
+.Op Fl iv
+.Ar rawdev
+.Sh DESCRIPTION
+.Nm vdmtool
+displays
+.\" rather crude
+information about the DG/UX volume information found on a disk.
+It may also be used to setup a "boot area" on a new disk, to turn it into
+a bootable device.
+.Pp
+The options are as follows:
+.Bl -tag -width rawdev
+.It Fl i
+Do not display volume information, but initialize a "boot area" instead.
+This will overwrite the first sector of the disk with a valid boot area
+descriptor, which declares the first 251KB of the disk as a boot area.
+.It Fl v
+Be more verbose, printing out VDIT sector information, as well as any
+unparsed byte in the VDIT structures.
+.It Ar rawdev
+The name of the raw disk device to operate upon.
+It may be abbreviated into a form recognizable by
+.Xr opendev 3 .
+.El
+.Sh SEE ALSO
+.Xr disklabel 8 ,
+.Xr installboot 8