*BSD News Article 21225


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From: fmayhar@acsc.com (Frank Mayhar)
Newsgroups: comp.os.386bsd.bugs
Subject: Problems with installation of NetBSD 0.9...
Date: 20 Sep 1993 23:17:10 GMT
Organization: Advanced Computing Systems Company
Lines: 45
Distribution: world
Message-ID: <27ldlm$j27@acsc.com>
Reply-To: fmayhar@acsc.com
NNTP-Posting-Host: cpuserver.acsc.com

I sent this to netbsd-bugs@sun-lamp.cs.berkeley.edu, but only got one
response (and that one was using an invalid assumption, since I hadn't
provided enough information), so I'm posting it here.

This is probably a FAQ, but I couldn't find it. I've been installing
NetBSD 0.9 on my 486 system this weekend, and have run into a
showstopper. From time to time, I get a "ISA strayintr 7" message, and
the system goes straight off into the weeds. It typically happens after
booting, right before fsck runs. (I also see a message indicating an
unexpected interrupt from wdc0 at this point, but I don't know whether
that is related.) If it happens during boot, the system hangs at
that point. If I get further, it happens during I/O, typically while
accessing my SCSI drive or tape. If it happens at this point, the system
is no longer able to contact the SCSI controller or the drive (either
tape or disk) itself, and it times them out. I'm seeing the problem
at boot about four times out of five; the only semi-reliable way of
avoiding it is to first boot DOS (which has a SCSI driver), and then
warm boot back to NetBSD.

This is making the system unusable.

My system is a 486/DX clone with 8 MB memory and 128K cache. It contains
a QuickPath 13-port multifunction card which provides 4 16550 serial
uarts, two floppy controllers (one of which is disabled) and an IDE
drive connection. The IDE drives (two) are a WD Cavair 2200, shared
between DOS and NetBSD, and a Quantum 80 MB drive which is all DOS. The
system also contains an Adaptec 1542B, with a Maxtor LX340SY and an
Archive 150 tape. Other cards, not used by NetBSD, are a PAS16 sound
card and a bus-mouse. The PAS16 uses IRQs 7 (for the Soundblaster side),
and 5 (for the PAS side; I don't have my list here at work, but I'm
reasonably sure that this is correct). The printer IRQ (on the Quickpath
card) is disabled.

I had been running 386bsd 0.1.2.4 with no problems. Removing the
PAS card is not really a viable alternative, nor is disabling the
Soundblaster side of that card. I'm surprised that getting a stray
interrupt causes the SCSI stuff to die; I wouldn't have thought they
were that closely related.

Any help or pointers to more information would be gratefully accepted.
Thanks.
-- 
Frank Mayhar  fmayhar@acsc.com
	      Advanced Computing Systems Company
	      3000 S. Robertson Blvd. Suite 400, LA, CA 90034   (310) 815-4858