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153 lines
4.6 KiB
Groff
153 lines
4.6 KiB
Groff
.\" Copyright (c) 1980, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)boot_tahoe.8 8.2 (Berkeley) 4/19/94
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.\"
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.Dd April 19, 1994
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.Dt BOOT 8 tahoe
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.Os
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.Sh NAME
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.Nm boot
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.Nd
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system bootstrapping procedures
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.Sh DESCRIPTION
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.Sy Power fail and crash recovery.
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Normally, the system will reboot itself at power-up or after crashes.
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An automatic consistency check of the file systems will be performed,
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and unless this fails, the system will resume multi-user operations.
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.Pp
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.Sy Cold starts.
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These are processor-type dependent.
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On the
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.Tn CCI
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Power 6/32 and related processors,
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the system will do a standard autoboot from drive 0
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upon power-up or reset.
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This automatic boot may be cancelled by typing a
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.Ql \&#
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in the first few seconds after reset.
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This enters console mode; the console prompt is
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.Ql >
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or
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.Ql \&# .
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The boot flags can be set to any hexadecimal value
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.Fl n
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with the command
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.Pp
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.Bd -filled -offset indent -compact
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.Li \&#> p23
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.Ar n .
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.Ed
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.Pp
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The default device may be examined or set; see the Diagnostics and Debugging
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manual for the processor for details on device naming and syntax.
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After setting the boot flags and/or device,
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a bootstrap sequence can be initiated with
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.Pp
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.Dl #> fb
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.Pp
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A specific device or bootstrap file may be used; for example,
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.Pp
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.Dl \&#> \&fb xfd(1,0)
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.Pp
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would boot from the `a' partition on
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.Tn XFD
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drive 1.
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.Pp
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The file specifications used for the boostrap
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when loaded with the
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.Dq askme
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flag
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(register 23 set to 1 or 3)
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are of the form:
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.Pp
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.Dl device(adaptor,controller,unit,minor)
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.Pp
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where
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.Ar device
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is the type of the device to be searched,
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.Ar adaptor
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is number of the
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.Tn VERSAbus
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(or
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.Tn VMEbus )
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to which the device is attached,
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.Ar controller
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is the unit number of the controller on that buss,
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.Ar unit
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is the unit number of the disk or tape,
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and
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.Ar minor
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is the disk partition or tape file number.
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Leading adaptor or controller numbers default to 0.
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Normal line editing characters can be used when typing the file specification.
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The following list of supported devices may vary from installation to
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installation:
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.Pp
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.Bd -unfilled -offset indent -compact
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dk SMD or ESDI disks on VDDC or SMD-E
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cy tape on Ciprico Tapemaster controller
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.Ed
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.Pp
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For example,
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to boot from a file system which starts at cylinder 0
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of unit 0 of an
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.Tn SMD-E
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disk, type
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.Ql dk(0,0)vmunix
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to the boot prompt;
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.Ql dk(2,1,0)vmunix
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would specify drive 1 on
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.Tn SMD-E
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controller 2.
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.Pp
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In an emergency, the bootstrap methods described in the paper
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.%T "Installing and Operating 4.3 BSD-tahoe UNIX on the Tahoe"
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can be used
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to boot from a distribution tape.
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.Sh FILES
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.Bl -tag -width /vmunix -compact
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.It Pa /vmunix
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system code
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.It Pa /boot
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system bootstrap
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.El
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.Sh SEE ALSO
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.Xr halt 8 ,
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.Xr reboot 8 ,
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.Xr shutdown 8
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.Sh BUGS
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The disklabel format used by some versions of the console processor
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is different than the format used by
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.Tn UNIX
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and the bootstrap.
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.Sh HISTORY
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