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Annotation of 43BSDReno/sbin/reboot/reboot_hp300.8, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1990 The Regents of the University of California.
        !             2: .\" All rights reserved.
        !             3: .\"
        !             4: .\" This code is derived from software contributed to Berkeley by
        !             5: .\" the Systems Programming Group of the University of Utah Computer
        !             6: .\" Science Department.
        !             7: .\"
        !             8: .\" Redistribution and use in source and binary forms are permitted provided
        !             9: .\" that: (1) source distributions retain this entire copyright notice and
        !            10: .\" comment, and (2) distributions including binaries display the following
        !            11: .\" acknowledgement:  ``This product includes software developed by the
        !            12: .\" University of California, Berkeley and its contributors'' in the
        !            13: .\" documentation or other materials provided with the distribution and in
        !            14: .\" all advertising materials mentioning features or use of this software.
        !            15: .\" Neither the name of the University nor the names of its contributors may
        !            16: .\" be used to endorse or promote products derived from this software without
        !            17: .\" specific prior written permission.
        !            18: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            19: .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            20: .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            21: .\"
        !            22: .\"    @(#)reboot_hp300.8      5.1 (Berkeley) 6/29/90
        !            23: .\"
        !            24: .TH REBOOT 8 "June 29, 1990"
        !            25: .UC 7
        !            26: .SH NAME
        !            27: reboot \- UNIX bootstrapping procedures
        !            28: .SH SYNOPSIS
        !            29: .B reboot
        !            30: [
        !            31: .B \-d
        !            32: ] [
        !            33: .B \-n
        !            34: ] [
        !            35: .B \-q
        !            36: ] [
        !            37: .B \-s
        !            38: ]
        !            39: .SH DESCRIPTION
        !            40: .PP
        !            41: UNIX is started by placing it at the beginning of physical memory
        !            42: and transferring to the entry point.
        !            43: Since the system is not reenterable,
        !            44: it is necessary to read it in from disk or tape
        !            45: each time it is to be bootstrapped.
        !            46: .PP
        !            47: .B Rebooting a running system.
        !            48: When a UNIX is running and a reboot is desired,
        !            49: .IR shutdown (8)
        !            50: is normally used.
        !            51: If there are no users then
        !            52: .B reboot
        !            53: can be used.
        !            54: Reboot causes the disks to be synced and allows the system
        !            55: to perform other shutdown activities such as resynchronizing
        !            56: hardware time-of-day clocks.
        !            57: A multi-user reboot (as described below) is then initiated.
        !            58: This causes a system to be
        !            59: booted and an automatic disk check to be performed.  If all this succeeds
        !            60: without incident, the system is then brought up for many users.
        !            61: .PP
        !            62: Options to reboot are:
        !            63: .TP
        !            64: .B \-d
        !            65: option forces a memory dump to the swap area (see
        !            66: .IR crash (8v))
        !            67: before rebooting.
        !            68: This can be used if the system is in a funny state that you would
        !            69: like to ``snapshot'' and analyze later.
        !            70: .TP
        !            71: .B \-n
        !            72: option avoids the sync.  It can be used if a disk or the processor
        !            73: is on fire. 
        !            74: .TP
        !            75: .B \-q
        !            76: reboots quickly and ungracefully, without shutting down running
        !            77: processes first.
        !            78: .TP
        !            79: .B \-s
        !            80: option reboots to single user mode.
        !            81: .PP
        !            82: .I Reboot
        !            83: normally logs the reboot using
        !            84: .IR syslog (8)
        !            85: and places a shutdown record in the login accounting file (see
        !            86: .IR utmp (5).
        !            87: These actions are inhibited if the
        !            88: .B \-n
        !            89: or
        !            90: .B \-q
        !            91: options are present.
        !            92: .PP
        !            93: .B "Power fail and crash recovery."
        !            94: Normally, the system will reboot itself at power-up or after crashes.
        !            95: An automatic consistency check of the file systems will be performed,
        !            96: and unless this fails, the system will resume multi-user operations.
        !            97: .PP
        !            98: .B "Cold starts."
        !            99: On an HP300, the boot procedure uses the boot rom to load a boot program
        !           100: from an LIF format directory at the beginning of an attached disk.
        !           101: The /usr/mdec directory contains a disk boot program ``bootrd''
        !           102: which should be placed in a new pack automatically by
        !           103: .IR newfs (8)
        !           104: when the ``a'' partition file system on the pack is created.
        !           105: .PP
        !           106: This
        !           107: .I boot
        !           108: program
        !           109: finds the corresponding file on the given device 
        !           110: .RI ( vmunix
        !           111: by default),
        !           112: loads that file into memory,
        !           113: and starts the program at the entry address specified in the program header.
        !           114: .PP
        !           115: The boot program can be interrupted by typing `^C' (ctrl-C).
        !           116: This will force the boot program to interactively prompt for a system to boot.
        !           117: If not interrupted, it will boot from the device from which the boot
        !           118: program itself was loaded.
        !           119: .PP
        !           120: The file specifications used for an interactive boot are of the form:
        !           121: .IP
        !           122: device(unit,minor)
        !           123: .PP
        !           124: where
        !           125: .I device
        !           126: is the type of the device to be searched,
        !           127: .I unit
        !           128: is 8 * the hpib number plus the unit number of the disk or tape,
        !           129: and
        !           130: .I minor
        !           131: is the disk partition or tape file number.
        !           132: Normal line editing characters can be used when typing the file specification.
        !           133: Currently, ``rd'' is the only valid
        !           134: .I device
        !           135: specifier.
        !           136: .PP
        !           137: For example,
        !           138: to boot from the `a' file system of unit 0 on HP-IB 2,
        !           139: type \*(lqrd(16,0)vmunix\*(rq
        !           140: to the boot prompt.
        !           141: For tapes, the minor device number gives a file offset.
        !           142: .PP
        !           143: In an emergency, the bootstrap methods described in the paper
        !           144: ``Installing 4.3bsd on the HP300''
        !           145: can be used to boot from a distribution tape.
        !           146: .SH FILES
        !           147: .ta \w'/usr/mdec/installboot   'u
        !           148: /vmunix        system code
        !           149: .br
        !           150: /usr/mdec/bootrd       LIF format boot block
        !           151: .br
        !           152: /usr/mdec/installboot  program to install boot blocks
        !           153: .SH "SEE ALSO"
        !           154: crash(8V),
        !           155: fsck(8),
        !           156: halt(8),
        !           157: init(8),
        !           158: newfs(8),
        !           159: rc(8),
        !           160: shutdown(8),
        !           161: syslogd(8)

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