*BSD News Article 98365


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From: Chris Kunath <cjk@ameritech.net>
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: sd0 becomes sd1 at boot-time?
Date: Tue, 24 Jun 1997 20:41:59 -0500
Organization: Ameritech Interactive Media Services, Inc.
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Howdy all,
Am having a problem installing 2.2.2 on a system with:

	DFI G586VPS-Pro (75Mhz Lynx chipset) mboard
	Cyrix P200+ cpu
	64M EDO RAM 60ns
	on mboard's onboard PCI0646 IDE xtlr:
		one IBM 3.24G ATA-2 IDE drive
	on NEC SmartSCSI (Adaptec 2930 [OEM 2940]) PCI SCSI xtlr:
		ID0: Quantum 3G Fireball SCSI drive
		ID6: Plextor 12x SCSI CD-ROM drive

The new FreeBSD 2.2.2 installs fine to a 500M partition at the end 
of the SCSI ID 0 drive.  However, when I try to boot from the
partition, it starts to load the OS, but fails trying to mount the
root partition.  

The weird thing is, it tries to mount sd1a.  There isn't an sd1
drive.  When I disable the onboard IDE controller, it boots from
the sd0a partition just fine, so it seems to be dynamically
deciding it needs to boot from another drive only if the
potentially evil onboard PCI0646 IDE controller is in action.
If the IDE controller is enabled, I can't boot from floppy and
redirect the boot to either sd0a or sd1a.

I recall reading something about problems with earlier revisions
of the PCI06xx series of IDE controllers.  This particular system
hasn't had any problems as an all-SCSI box, but I guess it has
some problems now.  Is there a way I could boot from the CD-ROM
[sd(6,a)kernel doesn't work], or does the El Torito stuff only
apply to IDE CD-ROM?  Any other clues, or should I just get 
another board (have already ordered a generic Symbios -875
SCSI controller, will see if that helps)?