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.\" $OpenBSD: mbr.8,v 1.1 2006/10/06 21:48:50 mickey Exp $
.\"
.\" Copyright (c) 2006 Michael Shalayeff
.\" All rights reserved.
.\"
.\" 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 MIND, 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 October 5, 2006
.Dt MBR 8 landisk
.Os
.Sh NAME
.Nm mbr
.Nd
LANDISK-specific Master Boot Record
.Sh DESCRIPTION
.Nm MBR
program that is only one sector (512 bytes) and also includes
a partition table for the disk is located in the 0th sector of the disk.
Upon receiving control from the system firmware
.Nm
will scan the partition table for an active partition and continue
loading the Primary Boot Record (PBR) from the beginnning of the
partition, if found.
.Pp
.Nm
is installed into the disk by the
.Xr fdisk 8
program that is also used to operate the partition table.
.Pp
Partition table sonsists of four entries only one of which may be
marked as
.Dq active
that is where the PBR will be loaded from.
.Sh DIAGNOSTICS
A few messages are printed in case of errors:
.Bl -tag -width no_active_partition
.It "No active partition"
Indicates that none of the partitions are marked
.Dq active .
.It Read error
An error occured while fetching the primary boot loader.
.It "No O/S"
The partition table is empty.
.El
.Sh SEE ALSO
.Xr boot 8 ,
.Xr bootxx 8 ,
.Xr boot_landisk 8 ,
.Xr disklabel 8 ,
.Xr fdisk 8
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