Date: Wed, 21 Apr 1999 13:49:21 -0400 From: Barry Lustig <barry@lustig.com> To: Wilko Bulte <wilko@yedi.iaf.nl> Cc: sthaug@nethelp.no, stable@FreeBSD.ORG, scsi@FreeBSD.ORG Subject: Re: SCSI Failure during Amanda Backup (Unexpected busfree) Message-ID: <19990421174922.5046.qmail@devious.lustig.com> In-Reply-To: <199904202220.AAA07016@yedi.iaf.nl> References: <199904202220.AAA07016@yedi.iaf.nl>
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The good news is that adding a second SCSI controller (Adaptec 2940UW) to my system, and connecting only the DLT 4000 to that controller, seems to have cleared up the problem. The bad news is, that there is some sort of strange interaction between the Ultra2 drives on the Ultra2 part of the Adaptec aic7890/91, and a DLT4000 (with the most recent Quantum firmware) on the Ultra part of the controller. Any pointers on how to help debug this further? barry On Wed, 21 Apr 1999, Wilko Bulte wrote: > As Barry Lustig wrote ... > What is odd is that it used to work. The errors only started on 4/3. Were > there any CAM changes around that time that might have this effect? > > barry > > No that I know, Ken or Justin might be able to give you better info. > > But anything that (for example) makes things go faster on the bus > could trigger problems. This is what debugging SCSI problems makes > so interesting :/ > > That is also the reason for my suggestion to play around a bit with the > SCSI config. > > On Tue, 20 Apr 1999, Wilko Bulte wrote: > As sthaug@nethelp.no wrote ... > I am using all 3 SCSI connectors on the motherboard. The 50 pin connector > > Wrong. This is one SCSI bus as far as I can see. SCSI buses are linear > things, not star shaped. And they have only 2 terminators, each on every > end of the bus. > > What you may be missing here is that the ASUS P2B-DS has the Adaptec > AIC 3860 bridge (as an option), which gives you an electrically isolated > single-ended bus. So in this case, it should be possible to use all three > connectors. > > Right, that definitely makes a difference. I don't know all the Asus > boards ;-) > > For troubleshooting I still like to suggest to go back to as simple > a SCSI config as possible. > > Groeten / Cheers, > Wilko > > Groeten / Cheers, > Wilko > _ ______________________________________________________________________ | > / o / / _ Arnhem, The Netherlands |/|/ / / /( (_) Bulte WWW : > <http://www.tcja.nl _______________________ Powered by FreeBSD ___ > <http://www.freebsd.org _____ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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