BOOT_MAC68K man page on OpenBSD

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BOOT_MAC68K(8)	   OpenBSD System Manager's Manual (Mac68k)	BOOT_MAC68K(8)

     boot_mac68k - mac68k-specific system bootstrapping procedures

   Power fail and crash recovery
     Normally, the OpenBSD 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 shutdown(8) command.

     If the system crashes, it will enter the kernel debugger, ddb(4), if it
     is configured in the kernel.  If the debugger is not present or has
     exited, the system will attempt a dump to the configured dump device
     (which will be automatically recovered with savecore(8) during the next
     boot cycle).  After the dump completes (successful or not), the system
     will attempt a reboot.

     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 OpenBSD boot
     program.  Additionally, the OpenBSD boot program can be configured to
     boot OpenBSD 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.

   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 bsd or
     bsd.test, or to boot from two different drives).

     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
     ``secure'' option from ttye0 in the ttys(5) file.

     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 (9600-8N1).	Either the
     printer port or the modem port (tty01 and tty00, respectively) may be
     used for this.

     It is sometimes useful to boot a kernel that resides in a folder in
     native OS rather than from the usual location in the OpenBSD file system.
     A radio button is supplied for this purpose.  The kernel may be
     compressed using gzip(1).	Note that some programs will not run properly
     if the kernel is not found as /bsd within the OpenBSD file system.

     /bsd     system kernel
     /bsd.rd  standalone installation kernel, suitable for disaster recovery

     ddb(4), ttys(5), savecore(8), shutdown(8)

OpenBSD 4.9			 May 31, 2007			   OpenBSD 4.9

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