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1 | .\" Copyright (c) 1980 Regents of the University of California. |
2 | .\" All rights reserved. The Berkeley software License Agreement | |
3 | .\" specifies the terms and conditions for redistribution. | |
4 | .\" | |
be1d37d3 | 5 | .\" @(#)boot_vax.8 6.2 (Berkeley) %G% |
021014a6 | 6 | .\" |
d730f4d7 | 7 | .TH REBOOT 8 "" |
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8 | .UC 4 |
9 | .SH NAME | |
10 | reboot \- UNIX bootstrapping procedures | |
11 | .SH SYNOPSIS | |
12 | .B /etc/reboot | |
13 | [ | |
14 | .B \-n | |
15 | ] [ | |
16 | .B \-q | |
17 | ] | |
18 | .SH DESCRIPTION | |
19 | .PP | |
20 | UNIX is started by placing it in memory | |
be1d37d3 | 21 | at location zero and transferring to the entry point. |
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22 | Since the system is not reenterable, |
23 | it is necessary to read it in from disk or tape | |
24 | each time it is to be bootstrapped. | |
25 | .PP | |
26 | .B Rebooting a running system. | |
27 | When a UNIX is running and a reboot is desired, | |
28 | .IR shutdown (8) | |
29 | is normally used. | |
30 | If there are no users then | |
31 | .B /etc/reboot | |
32 | can be used. | |
33 | Reboot causes the disks to be synced, and then a multi-user | |
34 | reboot (as described below) is initiated. This causes a system to be | |
35 | booted and an automatic disk check to be performed. If all this succeeds | |
36 | without incident, the system is then brought up for many users. | |
37 | .PP | |
38 | Options to reboot are: | |
39 | .TP | |
40 | .B \-n | |
41 | option avoids the sync. It can be used if a disk or the processor | |
6f055ecd | 42 | is on fire. |
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43 | .TP |
44 | .B \-q | |
45 | reboots quickly and ungracefully, without shutting down running | |
46 | processes first. | |
47 | .PP | |
48 | .B "Power fail and crash recovery." | |
49 | Normally, the system will reboot itself at power-up or after crashes. | |
50 | Provided the auto-restart is enabled on the machine front panel, | |
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51 | an automatic consistency check of the file systems will be performed, |
52 | and unless this fails, the system will resume multi-user operations. | |
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53 | .PP |
54 | .B Cold starts. | |
55 | These are processor type dependent. | |
56 | On an 11/780, there are two floppy files for each disk controller, | |
57 | both of which cause boots from unit 0 of the root file system | |
58 | of a controller located on mba0 or uba0. | |
59 | One gives a single user shell, while the other invokes the multi-user | |
60 | automatic reboot. Thus these files are HPS and HPM for the single | |
61 | and multi-user boot from MASSBUS RP06/RM03/RM05 disks, | |
62 | UPS and UPM for UNIBUS storage module controller and disks | |
63 | such as the EMULEX SC-21 | |
64 | and AMPEX 9300 pair, or HKS and HKM for RK07 disks. | |
be1d37d3 MK |
65 | There is also a script for booting from the default device, |
66 | which is normally a copy of one of the standard multi-user boot scripts, | |
67 | but which may be modified to perform other actions | |
68 | or to boot from a different unit. | |
69 | The situation on the 8600 is similar, with scripts loaded from the console RL02. | |
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70 | .PP |
71 | Giving the command | |
72 | .IP | |
73 | >>>BOOT HPM | |
74 | .LP | |
75 | Would boot the system from (e.g.) an RP06 and run the automatic consistency | |
76 | check as described in | |
77 | .IR fsck (8). | |
78 | (Note that it may | |
79 | be necessary to type control-P | |
be1d37d3 | 80 | and halt the processor |
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81 | to gain the attention of the LSI-11 before getting the >>> prompt.) |
82 | The command | |
83 | .IP | |
84 | >>>BOOT ANY | |
85 | .LP | |
86 | invokes a version of the boot program in a way which allows you to | |
87 | specify any system as the system to be booted. | |
88 | It reads from the console a device specification (see below) followed | |
89 | immediately by a pathname. | |
90 | .PP | |
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91 | The scripts may be modified for local configuration if necessary. |
92 | The boot device type is set in register 10 as the device major number. | |
93 | The flags and minor device are placed in register 11. | |
94 | The register is used in four one-byte fields; from least to most significant, | |
95 | they are boot flags (as defined in | |
96 | .IR <sys/reboot.h> ), | |
97 | disk partition, drive unit, and adaptor number (UNIBUS or MASSBUS as | |
98 | appropriate). | |
99 | .PP | |
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100 | On an 11/750, the reset button will boot from the device |
101 | selected by the front panel boot device switch. In systems | |
102 | with RK07's, position B normally selects the RK07 for boot. | |
103 | This will boot multi-user. To boot from RK07 with boot flags you | |
104 | may specify | |
105 | .IP | |
106 | >>>B/\fIn\fR DMA0 | |
107 | .LP | |
108 | where, giving a \fIn\fR of 1 causes the boot program | |
109 | to ask for the name of the system to be bootstrapped, | |
110 | giving a \fIn\fR of 2 causes the boot program to come up single | |
111 | user, and a \fIn\fR of 3 causes both of these actions to occur. | |
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112 | The ``DM'' specifies RK07, the ``A'' represents the adaptor number (UNIBUS |
113 | or MASSBUS), and the ``0'' is the drive unit number. | |
114 | Other disk types which may be used are DB (MASSBUS), DD (TU58), | |
115 | and DU (UDA-50/RA disk). | |
116 | A non-zero disk partition can be used by adding (partition times 1000 hex) | |
117 | to \fIn\fR. | |
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118 | .PP |
119 | The 11/750 boot procedure uses the boot roms to load block 0 off of | |
120 | the specified device. The /usr/mdec directory contains a number | |
121 | of bootstrap programs for the various disks which should be placed | |
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122 | in a new pack automatically by |
123 | .IR newfs (8) | |
124 | when the ``a'' partition file system on the pack is created. | |
021014a6 | 125 | .PP |
be1d37d3 | 126 | On any processor, the |
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127 | .I boot |
128 | program | |
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129 | finds the corresponding file on the given device |
130 | .RI ( vmunix | |
131 | by default), loads that file | |
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132 | into memory location zero, and starts the program at the entry address |
133 | specified in the program header (after clearing off the high bit | |
be1d37d3 | 134 | of the specified entry address). |
021014a6 | 135 | .PP |
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136 | The file specifications used with \*(lqBOOT ANY\*(rq or \*(lqB/3\*(rq |
137 | are of the form: | |
021014a6 | 138 | .IP |
be1d37d3 | 139 | device(unit,minor) |
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140 | .PP |
141 | where | |
142 | .I device | |
143 | is the type of the device to be searched, | |
144 | .I unit | |
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145 | is 8 * the mba or uba number plus |
146 | the unit number of the disk or tape, | |
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147 | and |
148 | .I minor | |
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149 | is the disk partition or tape file number. |
150 | Normal line editing characters can be used when typing the file specification. | |
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151 | The following list of supported devices may vary from installation to |
152 | installation: | |
153 | .ta 5 10 | |
154 | .nf | |
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155 | hp MASSBUS disk drive |
156 | up UNIBUS storage module drive | |
021014a6 | 157 | ht TE16,TU45,TU77 on MASSBUS |
6f055ecd | 158 | mt TU78 on MASSBUS |
021014a6 | 159 | hk RK07 on UNIBUS |
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160 | ra storage module on a UDA50 |
161 | rb storage module on a 730 IDC | |
162 | rl RL02 on UNIBUS | |
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163 | tm TM11 emulation tape drives on UNIBUS |
164 | ts TS11 on UNIBUS | |
6f055ecd | 165 | ut UNIBUS TU45 emulator |
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166 | .fi |
167 | .PP | |
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168 | For example, |
169 | to boot from a file system which starts at cylinder 0 | |
170 | of unit 0 of a MASSBUS disk, type \*(lqhp(0,0)vmunix\*(rq | |
171 | to the boot prompt; \*(lqup(0,0)vmunix\*(rq would specify | |
172 | a UNIBUS drive, \*(lqhk(0,0)vmunix\*(rq would specify | |
173 | an RK07 disk drive, \*(lqra(0,0)vmunix\*(rq would specify a | |
174 | UDA50 disk drive, and \*(lqrb(0,0)vmunix\*(rq would specify a | |
175 | disk on a 730 IDC. | |
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176 | For tapes, the minor device number gives a file offset. |
177 | .PP | |
178 | In an emergency, the bootstrap methods described in the paper | |
be1d37d3 | 179 | ``Installing and Operating 4.3bsd'' can be used |
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180 | to boot from a distribution tape. |
181 | .SH FILES | |
be1d37d3 | 182 | .ta \w'/usr/mdec/installboot 'u |
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183 | /vmunix system code |
184 | .br | |
185 | /boot system bootstrap | |
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186 | .br |
187 | /usr/mdec/xxboot sector-0 boot block for 750, xx is disk type | |
188 | .br | |
189 | /usr/mdec/bootxx second-stage boot for 750, xx is disk type | |
190 | .br | |
191 | /usr/mdec/installboot program to install boot blocks on 750 | |
021014a6 | 192 | .SH "SEE ALSO" |
be1d37d3 | 193 | arff(8V), |
6f055ecd KM |
194 | crash(8V), |
195 | fsck(8), | |
be1d37d3 | 196 | halt(8), |
6f055ecd | 197 | init(8), |
be1d37d3 | 198 | newfs(8), |
6f055ecd | 199 | rc(8), |
be1d37d3 | 200 | shutdown(8) |