*BSD News Article 58650


Return to BSD News archive

Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.cs.su.oz.au!metro!metro!munnari.OZ.AU!news.ecn.uoknor.edu!paladin.american.edu!zombie.ncsc.mil!news.mathworks.com!fu-berlin.de!news.dfn.de!RRZ.Uni-Koeln.DE!zpr.uni-koeln.de!se
From: se@ZPR.Uni-Koeln.DE (Stefan Esser)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Q: What video and SCSI devices work?
Date: 10 Jan 1996 17:54:03 GMT
Organization: Institute for Mathematics, University of Cologne, Germany
Lines: 30
Sender: se@Sysiphos (Stefan Esser)
Message-ID: <4d0ufr$3ef@news.rrz.uni-koeln.de>
References: <APC&1'0'9a157ee1'1a1@igc.apc.org> <4cglag$s0d@innocence.interface-business.de> <MICHAELV.96Jan9223044@MindBender.HeadCandy.com>
NNTP-Posting-Host: sysiphos.mi.uni-koeln.de

In article <MICHAELV.96Jan9223044@MindBender.HeadCandy.com>, michaelv@MindBender.HeadCandy.com (Michael L. VanLoon) writes:
|> The NCR can be flaky under heavy load, but it's also probably the
|> least expensive (good) PCI SCSI card you can get.

Well, the NCR driver isn't perfect (is anything),
but I don't think the above is right !


High load makes problems show up, which existed 
before, but just were never triggered. The most
recent such case I remember was caused by an old
chip set (Saturn I), which failed within seconds
under high load, if PCI optimizations are enabled.

There is nothing you can do about this, it will
affect any bus-master card. (Well, the NCR does 
fetch its microcode from system RAM itself, this 
makes it a little more sensitive to such problems)


If you observe the NCR fail under high load, then 
please let me know and I will try to help. This 
is not its common behaviour at all!

Regards, STefan
-- 
 Stefan Esser, Zentrum fuer Paralleles Rechnen		Tel:	+49 221 4706021
 Universitaet zu Koeln, Weyertal 80, 50931 Koeln	FAX:	+49 221 4705160
 ==============================================================================
 http://www.zpr.uni-koeln.de/~se			  <se@ZPR.Uni-Koeln.DE>