Date: Sat, 25 May 1996 06:02:50 -0700 (PDT) From: Chris Linstruth <cjl@qnet.com> To: rlyon@ozemail.com.au Cc: freebsd-hardware@freebsd.org, freebsd-isp@freebsd.org Subject: Re: FreeBSD: SCSI hangs, panics and other failures as nntp serv Message-ID: <Pine.UW2.3.92.960525055937.865B-100000@cello> In-Reply-To: <199605251101.VAA20328@oznet02.ozemail.com.au>
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Are you processing 200000 Usenet articles a day? And supporting readers? I'm certain we wouldn't be seeing any problems if the load wasn't so stressful. At least not as often. It's not that the system doesn't run. It's been up almost 4 days on this boot. A crash is inevitable though. Thanks. Chris Linstruth - cjl@qnet.com On Sat, 25 May 1996, Richard Lyon wrote: > > We at qnet have been attempting to use FreeBSD as a > > Usenet News server for about a year. We are at this time > > evaluating other alternatives because we have been unable to > > achieve the stability required under this kind of load. > > > > > Would another host adapter (Buslogic?) solve all our problems? > > > > I have used an Adaptec 1542B SCSI adapter for many years starting with > pre version 2.0 FreeBSD releases. I have a couple of hard drives and > a CDROM hanging off it (All internal). The system is rock solid and never has any > poblems. > > It sounds like there may be some sort of hardware setup problem. I > assume you checked for the obvious things like interrupt clashes, > port overlaps, DMA channel setup, synchronous negotiation, parity > checking, scsi terminators, etc ... ??? Also I assume you have tried more than more > than 1542 card to check that it is not just a faulty board. > > I seem to remember the only real problem we experienced was selecting > the correct wait states in the bios setup. Initially the machine experienced random > crashes until we got this right. > > A good simple check is to see if something like DOS runs OK on the > SCSI hard disk over a few hours. Also the 1542 manual has some good tips and should be > read very carefully. > > FreeBSD works perfectly well with the Adaptec 1542B card!! I am > currently running FSB 2.1R on a 33MHz 486 with a 1542B. I have not > customised the kernel in any way. > > Regards ... >
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