SUMMARY: how to disable broken scsi controller

From: Alexander Bezroutchko (
Date: Fri Jan 21 2000 - 07:58:55 CST


Thanks to the following people for their suggestions:

"Kulp, Scott (Scott)** CTR **" <>
Bismark Espinoza <bismark@alta.Jpl.Nasa.Gov>

The right answer was found in the AnswerBook:
"Platform Notes: Ultra 450 Workstation and Ultra Enterprise
450 Server << System Configuration Parameters"

It is necessary to alter "pci0-probe-list" in the NVRAM:

'setenv pci0-probe-list 2,4'

Original question:

My E450 has two scsi controller -- one onboard and additional
PCI Symbios controller. Onboard SCSI controller malfunctions
(scsi timeouts appear after some minutes/hours of work).
When I try to boot from setup cdrom, after bootstrap system
tries to probe disks on first controller (onboard) and hangs.
How can I disable onboard controller ?

Alexander Bezroutchko

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