1.\" $NetBSD: boot.8,v 1.5 1997/07/10 07:37:26 mikel Exp $ 2.\" 3.\" Copyright (c) 1992, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" @(#)boot_sparc.8 8.2 (Berkeley) 4/19/94 35.\" 36.Dd April 19, 1994 37.Dt BOOT 8 sun3 38.Os 39.Sh NAME 40.Nm boot 41.Nd 42system bootstrapping procedures 43.\" .Sh SYNOPSIS 44.\" .Nm reboot 45.\" .Op Fl n 46.\" .Op Fl q 47.\" .Oo 48.\" .Ar -- <boot string> 49.\" .Oc 50.Sh DESCRIPTION 51.Sy Power fail and crash recovery. 52Normally, the system will reboot itself at power-up or after crashes. 53An automatic consistency check of the file systems will be performed 54as described in 55.Xr fsck 8 . 56and unless this fails, the system will resume multi-user operations. 57.Pp 58.Sy Cold starts 59A disk-boot program (/usr/mdec/ufsboot) will attempt to load 60.Pa netbsd 61from partition A of the boot device, 62which must currently be an ``sd'' disk. 63Alternatively, network boot program (/usr/mdec/netboot) will load 64.Pa netbsd 65from the NFS root as determined by the procedure described in 66.Xr diskless 8 . 67.Pp 68The 69.Op Fl s 70flag to the boot loader will bring the system up in single-user mode. 71The 72.Op Fl a 73flag instructs the system to prompt for the location of the root filesystem 74and the primary swap partition. 75The 76.Op Fl d 77flag to the boot loader will bring the system up in debug mode. 78Here it waits for a kernel debugger connect; see 79.Xr ddb 4 . 80Any extra flags or arguments, the after the -- separator, 81.Ar <boot string> 82are passed to the boot prom. 83Other flags are currently ignored. 84.Pp 85At any time you can break back to the rom by pressing the `L1' and `a' 86keys at the same time (if the console is a serial port the same is 87achieved by sending a `break'). 88If you do this accidentally you can continue whatever was in progress 89by typing `c' followed by the return key. 90.Pp 91.Sh FILES 92.Bl -tag -width /usr/mdec/installboot -compact 93.It Pa /netbsd 94system code 95.It Pa /usr/mdec/bootxx 96first-level boot block for disks 97.It Pa /usr/mdec/netboot 98boot program for NFS (diskless) boot 99.It Pa /usr/mdec/ufsboot 100second-level boot program for UFS disks 101.It Pa /usr/mdec/installboot 102program to install bootxx on a disk 103.El 104.Sh SEE ALSO 105.Xr crash 8 , 106.Xr disklabel 8 , 107.Xr fsck 8 , 108.Xr halt 8 , 109.Xr init 8 , 110.Xr rc 8 , 111.Xr shutdown 8 , 112.Xr syslogd 8 113