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

1.1     ! root        1: .\" Copyright (c) 1980 The Regents of the University of California.
        !             2: .\" All rights reserved.
        !             3: .\"
        !             4: .\" Redistribution and use in source and binary forms are permitted provided
        !             5: .\" that: (1) source distributions retain this entire copyright notice and
        !             6: .\" comment, and (2) distributions including binaries display the following
        !             7: .\" acknowledgement:  ``This product includes software developed by the
        !             8: .\" University of California, Berkeley and its contributors'' in the
        !             9: .\" documentation or other materials provided with the distribution and in
        !            10: .\" all advertising materials mentioning features or use of this software.
        !            11: .\" Neither the name of the University nor the names of its contributors may
        !            12: .\" be used to endorse or promote products derived from this software without
        !            13: .\" specific prior written permission.
        !            14: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            15: .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            16: .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            17: .\"
        !            18: .\"    @(#)reboot_tahoe.8      6.3 (Berkeley) 6/24/90
        !            19: .\"
        !            20: .TH REBOOT 8 "June 24, 1990"
        !            21: .UC 4
        !            22: .SH NAME
        !            23: reboot \- UNIX bootstrapping procedures
        !            24: .SH SYNOPSIS
        !            25: .B reboot
        !            26: [
        !            27: .B \-n
        !            28: ] [
        !            29: .B \-q
        !            30: ]
        !            31: .SH DESCRIPTION
        !            32: .PP
        !            33: UNIX is started by placing it in memory
        !            34: at location zero and transferring to the entry point.
        !            35: Since the system is not reenterable,
        !            36: it is necessary to read it in from disk or tape
        !            37: each time it is to be bootstrapped.
        !            38: .PP
        !            39: .B Rebooting a running system.
        !            40: When a UNIX is running and a reboot is desired,
        !            41: .IR shutdown (8)
        !            42: is normally used.
        !            43: If there are no users then
        !            44: .B reboot
        !            45: can be used.
        !            46: Reboot causes the disks to be synced and allows the system
        !            47: to perform other shutdown activities such as resynchronizing
        !            48: hardware time-of-day clocks.
        !            49: A multi-user reboot (as described below) is then initiated.
        !            50: This causes a system to be
        !            51: booted and an automatic disk check to be performed.  If all this succeeds
        !            52: without incident, the system is then brought up for many users.
        !            53: .PP
        !            54: Options to reboot are:
        !            55: .TP
        !            56: .B \-n
        !            57: option avoids the sync.  It can be used if a disk or the processor
        !            58: is on fire. 
        !            59: .TP
        !            60: .B \-q
        !            61: reboots quickly and ungracefully, without shutting down running
        !            62: processes first.
        !            63: .PP
        !            64: .I Reboot
        !            65: normally logs the reboot using
        !            66: .IR syslog (8)
        !            67: and places a shutdown record in the login accounting file
        !            68: /var/log/wtmp.
        !            69: These actions are inhibited if the
        !            70: .B \-n
        !            71: or
        !            72: .B \-q
        !            73: options are present.
        !            74: .PP
        !            75: .B "Power fail and crash recovery."
        !            76: Normally, the system will reboot itself at power-up or after crashes.
        !            77: An automatic consistency check of the file systems will be performed
        !            78: as described in
        !            79: .IR fsck (8).
        !            80: and unless this fails, the system will resume multi-user operations.
        !            81: .PP
        !            82: .B Cold starts.
        !            83: These are processor-type dependent.
        !            84: On the CCI Power 6/32 and related processors,
        !            85: the system will do a standard autoboot from drive 0
        !            86: upon power-up or reset.
        !            87: This automatic boot may be cancelled by typing a \*(lq#\*(rq
        !            88: in the first few seconds after reset.
        !            89: This enters console mode; the console prompt is \*(lq>\*(rq or \*(lq#>\*(rq.
        !            90: The boot flags can be set to any hexadecimal value \fIn\fP with the command
        !            91: .IP
        !            92: #> p23 \fIn\fP.
        !            93: .LP
        !            94: The default device may be examined or set; see the Diagnostics and Debugging
        !            95: manual for the processor for details on device naming and syntax.
        !            96: After setting the boot flags and/or device,
        !            97: a bootstrap sequence can be initiated with
        !            98: .IP
        !            99: #> fb
        !           100: .LP
        !           101: A specific device or bootstrap file may be used; for example,
        !           102: .IP
        !           103: #> fb xfd(1,0)
        !           104: .LP
        !           105: would boot from the `a' partition on XFD drive 1.
        !           106: .PP
        !           107: The file specifications used for the boostrap
        !           108: when loaded with the \*(lqaskme\*(rq flag
        !           109: (register 23 set to 1 or 3)
        !           110: are of the form:
        !           111: .IP
        !           112: device(adaptor,controller,unit,minor)
        !           113: .PP
        !           114: where
        !           115: .I device
        !           116: is the type of the device to be searched,
        !           117: .I adaptor
        !           118: is number of the VERSAbus (or VMEbus) to which the device is attached,
        !           119: .I controller
        !           120: is the unit number of the controller on that buss,
        !           121: .I unit
        !           122: is the unit number of the disk or tape,
        !           123: and
        !           124: .I minor
        !           125: is the disk partition or tape file number.
        !           126: Leading adaptor or controller numbers default to 0.
        !           127: Normal line editing characters can be used when typing the file specification.
        !           128: The following list of supported devices may vary from installation to
        !           129: installation:
        !           130: .LP
        !           131: .ta 5 10
        !           132: .nf
        !           133:        dk      SMD or ESDI disks on VDDC or SMD-E
        !           134:        cy      tape on Ciprico Tapemaster controller
        !           135: .fi
        !           136: .PP
        !           137: For example,
        !           138: to boot from a file system which starts at cylinder 0
        !           139: of unit 0 of an SMD-E disk, type \*(lqdk(0,0)vmunix\*(rq
        !           140: to the boot prompt; \*(lqdk(2,1,0)vmunix\*(rq
        !           141: would specify drive 1 on SMD-E controller 2.
        !           142: .PP
        !           143: In an emergency, the bootstrap methods described in the paper
        !           144: ``Installing and Operating 4.3BSD-tahoe UNIX on the Tahoe'' can be used
        !           145: to boot from a distribution tape.
        !           146: .SH FILES
        !           147: .ta \w'/vmunix   'u
        !           148: /vmunix        system code
        !           149: .br
        !           150: /boot  system bootstrap
        !           151: .SH "SEE ALSO"
        !           152: crash(8),
        !           153: disklabel(8),
        !           154: fsck(8),
        !           155: halt(8),
        !           156: init(8),
        !           157: rc(8),
        !           158: shutdown(8),
        !           159: syslogd(8)
        !           160: .SH BUGS
        !           161: The disklabel format used by some versions of the console processor
        !           162: is different than the format used by UNIX and the bootstrap.

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