BOOT(8) | System Manager's Manual (Mac68k) | BOOT(8) |
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 the debugger is 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 is complete (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 NetBSD boot program. Additionally, the NetBSD boot program can be configured to boot NetBSD 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.
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-N81). 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 NetBSD 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 /netbsd within the NetBSD file system.
July 1, 1995 | NetBSD 6.1 |