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-.\" $OpenBSD: sgivol.8,v 1.7 2020/04/23 21:28:10 jmc Exp $
-.\"
-.\" Copyright (c) 2005 Theo de Raadt
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\" notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\" notice, this list of conditions and the following disclaimer in the
-.\" documentation and/or other materials provided with the distribution.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"
-.Dd $Mdocdate: April 23 2020 $
-.Dt SGIVOL 8 sgi
-.Os
-.Sh NAME
-.Nm sgivol
-.Nd initialise and manipulate SGI disk volume headers
-.Sh SYNOPSIS
-.Nm sgivol
-.Op Fl q
-.Ar disk
-.Nm sgivol
-.Op Fl q
-.Fl d Ar vhfilename
-.Ar disk
-.Nm sgivol
-.Op Fl q
-.Fl i
-.Op Fl h Ar vhsize
-.Ar disk
-.Nm sgivol
-.Op Fl q
-.Fl l Ar vhfilename1 Ar vhfilename2
-.Ar disk
-.Nm sgivol
-.Op Fl q
-.Fl r Ar vhfilename diskfilename
-.Ar disk
-.Nm sgivol
-.Op Fl q
-.Fl w Ar vhfilename diskfilename
-.Ar disk
-.Sh DESCRIPTION
-.Nm
-is used to initialise and manipulate SGI disk volume headers.
-.Pp
-The SGI volume header is a disklabel-like structure located at the
-start of a disk.
-It is typically 3135 (512-byte) blocks in size, and can store a
-variety of files inside it, typically boot programs.
-.Pp
-The options are as follows:
-.Bl -tag -width flag_opt
-.It Fl d Ar vhfilename
-Delete the file
-.Ar vhfilename
-from the filesystem storage space in the volume header.
-.It Fl h Ar vhsize
-Choose an alternate volume header size, in (512-byte) disk blocks.
-The default is 3135 blocks.
-.It Fl i
-Initialise a volume header on the supplied device.
-.It Fl l Ar vhfilename1 Ar vhfilename2
-Link the file
-.Ar vhfilename1
-to the file
-.Ar vhfilename2
-within the filesystem storage space in the volume header.
-.It Fl q
-Be quiet about various diagnostic issues.
-.It Fl r Ar vhfilename diskfilename
-Locate the file
-.Ar vhfilename
-in the storage space of the volume header, and copy it to the
-standard file
-.Ar diskfilename .
-.It Fl w Ar vhfilename diskfilename
-Copy the standard file
-.Ar diskfilename
-to the filesystem storage space in the volume header, placing
-it there with the name
-.Ar vhfilename .
-.It Ar disk
-The name of the disk containing the partition in which the second-stage
-boot program resides and the first-stage boot program is to be installed.
-This can either be specified in short form (e.g.,
-.Sq sd0
-or as the explicit device node, such as
-.Pa /dev/rsd0c ) .
-.Pp
-Note that you must be in single-user mode or have your kernel in
-insecure mode (see the
-.Xr sysctl 8
-.Va kern.securelevel
-variable or
-.Pa /etc/rc.securelevel )
-to enable access to the raw partition of a mounted disk.
-.El
-.Pp
-If no special flags are supplied,
-.Nm
-will display the current volume header information.
-.Sh EXAMPLES
-The typical use is
-.Bd -literal -offset indent
-# /usr/mdec/sgivol -i sd0
-# /usr/mdec/sgivol -w boot /usr/mdec/boot sd0
-.Ed
-.Sh SEE ALSO
-.Xr disklabel 8 ,
-.Xr init 8