1.\" $NetBSD: boot.8,v 1.5 2002/02/13 08:18:29 ross 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 November 28, 1999 37.Dt BOOT 8 mvme68k 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.Ss 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.Ss Cold starts from disk 58The disk-boot program 59.Pa ( /usr/mdec/bootsd ) 60will attempt to load 61.Pa netbsd 62from partition A of the boot device, 63which must currently be an 64.Dq sd 65disk. 66.Ss Cold starts from tape 67The tape-boot program 68.Pa ( /usr/mdec/bootst ) 69will attempt to load 70.Pa netbsd 71from a SCSI tape drive. 72.Ss Cold starts over a network 73The network boot program 74.Pa ( /usr/mdec/netboot ) 75will load 76.Pa netbsd 77from the NFS root as determined by the procedure described in 78.Xr diskless 8 . 79Note that the MVME147 is unable to boot directly from the 80network without the help of a small bootloader program 81.Pa ( /usr/mdec/sboot ) . 82.Pp 83The 84.Fl s 85flag to the boot loader will bring the system up in single-user mode. 86The 87.Fl a 88flag instructs the system to prompt for the location of the root filesystem 89and the primary swap partition. 90The 91.Fl d 92flag to the boot loader will bring the system up in debug mode. 93Here it waits for a kernel debugger connect; see 94.Xr ddb 4 . 95The 96.Fl q 97flag to the boot loader would boot the system in 98quiet mode, 99.Fl v 100in verbose mode. 101Any extra flags or arguments, the after the -- separator, 102.Ar \*[Lt]boot string\*[Gt] 103are passed to the boot prom. 104Other flags are currently ignored. 105.Pp 106At any time you can break to the kernel debugger 107.Xr ddb 4 108(assuming 109.Sy options DDB 110was specified in the kernel configuration file) 111by sending a serial line BREAK character. 112If you do this accidentally you can continue whatever was in progress 113by typing 114.Sq c 115followed by the return key. 116.Sh FILES 117.Bl -tag -width /usr/mdec/installboot -compact 118.It Pa /netbsd 119system code 120.It Pa /usr/mdec/bootxx 121first-level boot block for disks 122.It Pa /usr/mdec/stboot 123first-level boot block for tapes 124.It Pa /usr/mdec/bootsd 125second-level boot block for UFS disks 126.It Pa /usr/mdec/bootst 127second-level boot block for tapes 128.It Pa /usr/mdec/netboot 129boot program for NFS (diskless) boot 130.It Pa /usr/mdec/sboot 131network bootstrap program for MVME147 132.It Pa /usr/mdec/installboot 133program to install bootxx on a disk 134.El 135.Sh SEE ALSO 136.Xr disklabel 8 , 137.Xr fsck 8 , 138.Xr halt 8 , 139.Xr init 8 , 140.Xr rc 8 , 141.Xr shutdown 8 , 142.Xr syslogd 8 143