.\"	$OpenBSD: boot_sun3.8,v 1.8 1999/07/08 19:58:30 deraadt Exp $
.\"	$NetBSD: boot_sun3.8,v 1.1 1995/08/08 20:46:20 gwr Exp $
.\"
.\" Copyright (c) 1992, 1993
.\"	The Regents of the University of California.  All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
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.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
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.\"     @(#)boot_sparc.8	8.2 (Berkeley) 4/19/94
.\"
.Dd April 19, 1994
.Dt BOOT_SUN3 8 sun3
.Os
.Sh NAME
.Nm boot
.Nd
.Tn sun3-specific
system bootstrapping procedures
.Sh DESCRIPTION
.Ss Power fail and crash recovery
Normally, the system will reboot itself at power-up or after crashes.
An automatic consistency check of the file systems will be performed
as described in
.Xr fsck 8 .
and unless this fails, the system will resume multi-user operations.
.Pp
.Ss Cold starts
A disk-boot program
.Pq Pa /usr/mdec/ufsboot
will attempt to load
.Pa bsd
from partition
.Dq a
of the boot device,
which must currently be an
.Dq sd
disk.
Alternatively, the network boot program
.Pq Pa /usr/mdec/netboot
will load
.Pa bsd
from the NFS root as determined by the procedure described in
.Xr diskless 8 .
.Pp
The
.Fl s
flag to the bootloader will bring the system up in single-user mode.
The
.Fl a
flag instructs the system to prompt for the location of the root filesystem
and the primary swap partition.
The
.Fl d
flag to the bootloader will bring the system up in debug mode.
Here it waits for a kernel debugger connect; see
.Xr ddb 8 .
Other flags are currently ignored.
.Pp
At any time you can break back to the ROM by pressing the
.Dq L1
and
.Dq a
keys at the same time (if the console is a serial port the same is
achieved by sending a
.Dq break ) .
If you do this accidentally you can continue whatever was in progress
by typing
.Dq c
followed by the return key.
.Sh FILES
.Bl -tag -width /usr/mdec/installboot -compact
.It Pa /bsd
system code
.It Pa /usr/mdec/bootxx
first-level boot block for disks
.It Pa /usr/mdec/netboot
boot program for NFS (diskless) boot
.It Pa /usr/mdec/ufsboot
second-level boot program for UFS disks
.It Pa /usr/mdec/installboot
program to install bootxx on a disk
.El
.Sh SEE ALSO
.Xr crash 8 ,
.Xr disklabel 8 ,
.Xr fsck 8 ,
.Xr halt 8 ,
.Xr init 8 ,
.Xr rc 8 ,
.Xr shutdown 8 ,
.Xr syslogd 8