[comp.sys.sun] Autobooting 3/180 from sd0 rather than xy0

ittai@shemesh.gba.nyu.edu (Ittai Hershman) (09/26/89)

We have a Sun-3/180 with an old 130meg Fujitsu drive on an XY controller.
It came with a SCSI cartridge tape drive, and as a result I was able to
hang a Wren-IV off th external SCSI port.

The problem is that as long as I have physical access to the console I can
boot off the Wren with: B SD(), but I cannot do remote reboots (or a
"shutdown -r") because the system's PROM seems to default to the XY
controller.

Does anyone know how to modify the boot default disk?

Thanks,
-Ittai

PS: Please respond to me, I will summmarize to sun-spots/comp.sys.sun.

ittai@shemesh.gba.nyu.edu (Ittai Hershman) (09/27/89)

Thanks to the many respondents.  I obviously didn't look carefully
enough at the manuals...			-Ittai

Alex Dupuy was the first, so here is the solution in his words:

You want to update the eeprom for your system.  Since the XY has higher
priority than the SD in the normal sequence, you have to specify an
explicit default boot device.  The command needed to do that is:

        eeprom "default_boot=true" "bootdev=sd(0,0,0)"

You need to be superuser (or have write access to /dev/eeprom) to do this.