boot_mvme68k man page on OpenBSD

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BOOT_MVME68K(8)	   OpenBSD System Manager's Manual (MVME68k)   BOOT_MVME68K(8)

     boot_mvme68k - mvme68k system bootstrapping procedures

   Cold starts
     When powered on, the mvme68k BUG firmware will proceed to its
     initialization, and will boot an operating system if autoboot is enabled.
     By sending a ``break'' to the serial line during the initialization
     sequence, it is possible to stop the boot process and interact with the

   Warm starts
     After a panic, or if the system is rebooted via reboot(8) or shutdown(8),
     the BUG firmware will only restart the operating system if autoboot is
     enabled and ``Auto Boot at power-up only'' is disabled in the BUG

   Boot process options
     The BUG firmware will let the user enter a boot device identification,
     kernel filename and boot options.	If no filename is specified, /bsd will
     be used by default.

     The following boot options are recognized:

	   -a	 Prompt for the root filesystem device after the devices have
		 been configured.
	   -b	 On the next system reboot, always halt the system, even if a
		 reboot is required.
	   -c	 Enter the ``User Kernel Configuration'' mode upon startup
		 (see boot_config(8)).
	   -d	 Enter the debugger, ddb(4), as soon as the kernel console has
		 been initialized.
	   -s	 Boot the system single-user.  The system will be booted
		 multi-user unless this option is specified.

   Abnormal system termination
     In case of system crashes, the kernel will usually enter the kernel
     debugger, ddb(4), unless it is not present in the kernel, or it is
     disabled via the ddb.panic sysctl.	 Upon leaving ddb, or if ddb was not
     entered, the kernel will halt the system if it was still in device
     configuration phase, or attempt a dump to the configured dump device, if
     possible.	The crash dump will then be recovered by savecore(8) during
     the next multi-user boot cycle.  It is also possible to force other
     behaviours from ddb.

     /bsd		    default system kernel
     /bsd.rd		    standalone installation kernel, suitable for
			    disaster recovery
     /usr/mdec/bootxx	    primary bootstrap code for ``ffs'' file system on
			    SCSI disks
     /usr/mdec/bootsd	    secondary bootstrap code for SCSI disks (usually
			    also installed as /bootsd)
     /usr/mdec/bootst	    SCSI tape bootstrap code
     /usr/mdec/netboot	    network bootstrap code
     /usr/mdec/sboot	    network bootstrap code in S-Records, for older BUG
			    firmware lacking the NBO command.
     /usr/mdec/rboot	    network bootstrap code in S-Records, suitable for
			    user eeprom burning.
     /usr/mdec/stboot	    Motorola VID block put as first file on bootable
			    SCSI tapes

     ddb(4), boot_config(8), halt(8), init(8), installboot(8), reboot(8),
     savecore(8), shutdown(8)

OpenBSD 4.9			January 3, 2010			   OpenBSD 4.9

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