xref: /netbsd-src/share/man/man8/man8.mac68k/boot.8 (revision ed449c067d86deb393267e30086b2b1ab134de4c)

.\"	$NetBSD: boot.8,v 1.10 2009/09/05 11:37:52 wiz Exp $
.\"
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.\"	From:
.\"	@(#)boot_hp300.8	8.2 (Berkeley) 4/19/94
.\"
.Dd July 1, 1995
.Dt BOOT 8 mac68k
.Os
.Sh NAME
.Nm boot
.Nd
system bootstrapping procedures
.Sh DESCRIPTION
.Ss Power fail and crash recovery
Normally, the
.Nx
kernel on the mac68k architecture is booted from the native operating
system by means of an application program.
When the kernel takes over,
it initializes itself and proceeds to boot the system.
An automatic consistency check of the file systems takes place,
and unless this fails, the system comes up to multi-user operations.
The proper way to shut the system down is with the
.Xr shutdown 8
command.
.Pp
If the system crashes, it will enter the kernel debugger,
.Xr ddb 4 ,
if it is configured in the kernel.
If the debugger is not present,
or the debugger is exited, the system will attempt a dump to the
configured dump device (which will be automatically recovered with
.Xr savecore 8
during the next boot cycle).
After the dump is complete (successful
or not), the system will attempt a reboot.
.Pp
On most mac68k machines with "soft-power" after the IIcx, the power
switch can be physically rotated and locked in the 'on' position.
The native OS can be configured to automatically start the
.Nx
boot program.
Additionally, the
.Nx
boot program can be configured to boot
.Nx
without intervention.
When a system is so configured, it can crash or lose power and
reboot back to a fully multi-user state without any intervention.
.Pp
.Ss The boot application
The boot application runs in the native OS on the system.
It has a dialog where booting preferences may be changed and an
option whereby these options may be saved.
The preferences are stored in the program
itself, not in a preferences folder--thus allowing two separate copies
of the program to be configured differently (e.g. to boot different
netbsd or netbsd.test, or to boot from two different drives).
.Pp
One option that may be specified is a boot to single-user mode.
This stops the boot process very early on and allows system maintenance.
If one wishes to provide some security at this phase of the boot, remove
the
.Ql secure
option from ttye0 in the
.Xr ttys 5
file.
.Pp
Another useful option that may be specified is the "serial console"
option.
This will allow a serial device (terminal or computer) to
act as a console for the system.
This device must be configured to
use 9600 baud, eight bits, no parity, and one stop bit (9600-N81).
Either the printer port or the modem port (tty01 and tty00,
respectively) may be used for this.
.Pp
It is sometimes useful to boot a kernel that resides in a folder
in native OS rather than from the usual location in the
.Nx
file system.
A radio button is supplied for this purpose.
Note that
some programs will not run properly if the kernel is not found as
.Ar /netbsd
within the
.Nx
file system.
.Sh FILES
.Bl -tag -width /netbsd -compact
.It Pa /netbsd
system kernel
.El
.Sh SEE ALSO
.Xr ddb 4 ,
.Xr ttys 5 ,
.Xr savecore 8 ,
.Xr shutdown 8