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From: terry@spcvxb.spc.edu (Terry Kennedy, Operations Mgr.)
Subject: Re: Adaptec 2940W Hanging the machine?
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References: <jeremy-2706961516390001@jeremy.vcn.com>
Sender: news@spcuna.spc.edu (Network News)
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Organization: St. Peter's College, US
Date: Fri, 28 Jun 1996 08:12:56 GMT
Message-ID: <1996Jun28.041256.1@spcvxb.spc.edu>
Lines: 26
In article <jeremy-2706961516390001@jeremy.vcn.com>, jeremy@vcn.com (Jeremy Malli) writes:
> [...] will work great, for about twenty minutes. Then, without any core
> dump or noticable crash, it simply hangs everything. I can't type on the
> console, and all processes hang. I'm using BSD/OS 2.1 with all the
> current kernel and binary patches. I thought this was supposed to be
> fixed by now...
As far as I know, there aren't any hang problems in the SCSI driver set
(I can say for sure about the 2.0.1 bha driver that there aren't, and I'm
relatively certain about the aha driver as well - I have no experience with
the ncr, sa (152x) and aic drivers).
In general, if you get a SCSI lockup you've got either bad cables/termi-
nation, a bad drive/microcode, or bad firmware in the host adapter, listed
in order of decreasing probability. Try disabling fast mode and/or sync
negotiation and see if that helps. If it does, go get better cables and an
active terminator and try again.
There are SCSI bus analyzers (big $) and SCSI terminators with more than
the usual number of LED's on them. Either of these will help you trouble-
shoot a locked up SCSI bus, as long as you have it in place before the prob-
lem happens.
Terry Kennedy Operations Manager, Academic Computing
terry@spcvxa.spc.edu St. Peter's College, Jersey City, NJ USA
+1 201 915 9381 (voice) +1 201 435-3662 (FAX)