| | 1 | .\" Copyright (c) 1991, 1993 |
| | 2 | .\" The Regents of the University of California. All rights reserved. |
| | 3 | .\" |
| | 4 | .\" This code is derived from software written and contributed |
| | 5 | .\" to Berkeley by William Jolitz. |
| | 6 | .\" |
| | 7 | .\" Redistribution and use in source and binary forms, with or without |
| | 8 | .\" modification, are permitted provided that the following conditions |
| | 9 | .\" are met: |
| | 10 | .\" 1. Redistributions of source code must retain the above copyright |
| | 11 | .\" notice, this list of conditions and the following disclaimer. |
| | 12 | .\" 2. Redistributions in binary form must reproduce the above copyright |
| | 13 | .\" notice, this list of conditions and the following disclaimer in the |
| | 14 | .\" documentation and/or other materials provided with the distribution. |
| | 15 | .\" 3. All advertising materials mentioning features or use of this software |
| | 16 | .\" must display the following acknowledgement: |
| | 17 | .\" This product includes software developed by the University of |
| | 18 | .\" California, Berkeley and its contributors. |
| | 19 | .\" 4. Neither the name of the University nor the names of its contributors |
| | 20 | .\" may be used to endorse or promote products derived from this software |
| | 21 | .\" without specific prior written permission. |
| | 22 | .\" |
| | 23 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| | 24 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 25 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 26 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| | 27 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 28 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 29 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 30 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 31 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 32 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 33 | .\" SUCH DAMAGE. |
| | 34 | .\" |
| | 35 | .\" @(#)boot_i386.8 8.2 (Berkeley) 4/19/94 |
| | 36 | .\" |
| | 37 | .Dd April 19, 1994 |
| | 38 | .Dt BOOT 8 i386 |
| | 39 | .Os |
| | 40 | .Sh NAME |
| | 41 | .Nm boot |
| | 42 | .Nd |
| | 43 | system bootstrapping procedures |
| | 44 | .Sh DESCRIPTION |
| | 45 | .Sy Power fail and crash recovery. |
| | 46 | Normally, the system will reboot itself at power-up or after crashes. |
| | 47 | An automatic consistency check of the file systems will be performed, |
| | 48 | and unless this fails, the system will resume multi-user operations. |
| | 49 | .Pp |
| | 50 | .Sy Cold starts. |
| | 51 | The 386 |
| | 52 | .Tn "PC AT" |
| | 53 | clones attempt to boot the floppy disk drive A (otherwise known as drive |
| | 54 | 0) first, and failing that, attempt to boot the hard disk C (otherwise |
| | 55 | known as hard disk controller 1, drive 0). |
| | 56 | The automatic boot will attempt to load |
| | 57 | .Pa vmunix |
| | 58 | from partition A of either the floppy or the hard disk. |
| | 59 | This boot may be aborted by typing any character on the keyboard repeatedly |
| | 60 | (four or five times at least) during the operating system load phase, after |
| | 61 | which the bootstrap will prompt for the file that you wish to load instead. |
| | 62 | .Pp |
| | 63 | One exception to this is the |
| | 64 | .Ql d |
| | 65 | key, which will not abort the load but instead silently force the |
| | 66 | .Dv DEBUG |
| | 67 | boot flags. |
| | 68 | The boot flags for an autoboot are 0, and 3 for the successive boot after |
| | 69 | an aborted autoboot sequence. |
| | 70 | No other provison is made for setting boot flags (yet). |
| | 71 | A specific device or bootstrap file may be used; for example, |
| | 72 | .Pp |
| | 73 | The file specifications used for the boostrap |
| | 74 | when loaded with the |
| | 75 | .Dq askme |
| | 76 | flag |
| | 77 | (e.g. an aborted autoboot) |
| | 78 | are of the form: |
| | 79 | .Pp |
| | 80 | .Dl device unit partition: |
| | 81 | .Pp |
| | 82 | where |
| | 83 | .Ar device |
| | 84 | is the type of the device, assumed to be on the ISA bus, to be searched, |
| | 85 | .Ar unit |
| | 86 | is the unit number of the disk or tape, |
| | 87 | and |
| | 88 | .Ar partition |
| | 89 | is the disk partition or tape file number. |
| | 90 | Normal line editing characters can be used when typing the file specification. |
| | 91 | The following list of supported devices may vary from installation to |
| | 92 | installation: |
| | 93 | .Bd -unfilled -offset indent |
| | 94 | wd ST506, IDE, ESDI, RLL disks on a WD100[2367] or lookalike |
| | 95 | controller |
| | 96 | fd 5 1/4" or 3 1/2" High density floppies |
| | 97 | .Ed |
| | 98 | .Pp |
| | 99 | For example, |
| | 100 | to boot from a file system which starts at cylinder 0 |
| | 101 | of unit 0 of an IDE disk, type |
| | 102 | .Dq Li wd0a:vmunix |
| | 103 | to the boot prompt; |
| | 104 | .Dq Li fd0a:vmunix |
| | 105 | would specify a 3 1/2" floppy drive 0 . |
| | 106 | .Pp |
| | 107 | In an emergency, the bootstrap methods described in the paper |
| | 108 | .%T "Installing and Operating 4.3 BSD-Reno UNIX on the AT/386" |
| | 109 | can be used |
| | 110 | to boot from a distribution tape. |
| | 111 | .Sh FILES |
| | 112 | .Bl -tag -width /vmunixxx -compact |
| | 113 | .It Pa /vmunix |
| | 114 | system code |
| | 115 | .It Pa /boot |
| | 116 | system bootstrap |
| | 117 | .El |
| | 118 | .Sh SEE ALSO |
| | 119 | .Xr halt 8 , |
| | 120 | .Xr reboot 8 , |
| | 121 | .Xr shutdown 8 |
| | 122 | .Sh BUGS |
| | 123 | The disklabel format used by this version of |
| | 124 | .Bx |
| | 125 | is quite |
| | 126 | different from that of other architectures. |
projects / apple / system_cmds.git / blame_incremental