145 lines
4.5 KiB
Groff
145 lines
4.5 KiB
Groff
.\" $NetBSD: installboot.8,v 1.1 1996/11/06 23:07:55 cgd Exp $
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.\"
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.\" Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
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.\" Copyright (c) 1995 Paul Kranenburg
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by Paul Kranenburg.
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.\" 3. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd November 6, 1996
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.Dt INSTALLBOOT 8
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.Os
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.Sh NAME
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.Nm installboot
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.Nd install bootstrap software on an FFS partition
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.Sh SYNOPSIS
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.Nm installboot
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.Op Fl nv
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.Ar boot
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.Ar bootxx
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.Ar device
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.Sh DESCRIPTION
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The
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.Nm installboot
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utility prepares an FFS partition for bootstrapping.
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.Pp
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The NetBSD/alpha disk bootstrap software is split into two parts:
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a small first-stage boot program that is written into the disklabel
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area of a disk
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.Po
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and hence is limited in size to 7680 bytes
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.Pc ,
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and a second-stage boot program that resides in the filesystem proper
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.Po
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typically with the name
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.Pa /boot
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.Pc .
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The first-stage boot program is loaded into memory by the SRM console
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software. After receiving control of the system, it loads the
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second-stage boot program from a set of filesystem block numbers that
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have been
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hard-coded into it by
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.Nm installboot .
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The second-stage boot program locates and loads the kernel.
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.Pp
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The second-stage boot program and the prototype code for the
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first-stage boot program can be found in
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.Pa /usr/mdec/boot
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and
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.Pa /usr/mdec/bootxx ,
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respectively.
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.Pa /usr/mdec/boot
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may be installed simply by copying it to the root directory of the
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partition you wish to boot from, but after it is installed
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.Nm installboot
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.Em must
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be run.
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.Pp
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The options recognized by
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.Nm installboot
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are as follows:
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.Bl -tag -width flag
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.It Fl n
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Do not actually write anything on the disk.
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.It Fl v
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Verbose mode.
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.El
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.Pp
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The arguments are:
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.Bl -tag -width bootxx
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.It Ar boot
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The name of the second-stage boot program in the file system
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where the first-stage boot program is to be installed.
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.It Ar bootxx
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The name of the prototype file for the first-stage boot program.
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.It Ar device
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The name of the raw device in which the first-stage boot program
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is to be installed.
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This should be the raw device containing the file system
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which holds
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.Ar boot .
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.El
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.Sh EXAMPLES
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The following command will install the first-stage boot program in the
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root filesystem
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.Pq assumed to be mounted from Dq sd0a
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using the file
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.Pa /boot
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as the second-stage boot program:
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.Bd -literal -offset indent
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installboot /boot /usr/mdec/bootxx /dev/rsd0a
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.Ed
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.Sh BUGS
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NetBSD/alpha systems are only capable of booting off of disks'
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.Dq a
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partitions, and bootable partitions must start at the beginning
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of the disk.
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.Pp
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.Nm Installboot
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requires simultaneous access to the mounted file system and
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the raw device.
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That is not allowed with the kernel
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.Dv securelevel
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variable
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.Po
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see
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.Xr sysctl 8
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.Pc
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set to a value greater than zero, so
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.Nm installboot
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only works when the system is in
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an insecure mode (e.g. single-user mode; see
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.Xr init 8 ).
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.Sh "SEE ALSO"
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.Xr disklabel 8 ,
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.Xr init 8 ,
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.Xr sysctl 8
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.Sh HISTORY
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The NetBSD/alpha
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.Nm
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command first appeared in
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.Nx 1.2 .
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