From owner-freebsd-isp Wed Oct 13 9:22:17 1999 Delivered-To: freebsd-isp@freebsd.org Received: from pau-amma.whistle.com (pau-amma.whistle.com [207.76.205.64]) by hub.freebsd.org (Postfix) with ESMTP id C910F14EC9 for ; Wed, 13 Oct 1999 09:22:12 -0700 (PDT) (envelope-from dhw@whistle.com) Received: (from dhw@localhost) by pau-amma.whistle.com (8.9.2/8.9.2) id JAA31137; Wed, 13 Oct 1999 09:22:08 -0700 (PDT) Date: Wed, 13 Oct 1999 09:22:08 -0700 (PDT) From: David Wolfskill Message-Id: <199910131622.JAA31137@pau-amma.whistle.com> To: angrick@netdirect.net, freebsd-isp@FreeBSD.ORG Subject: Re: wierd SCSI problems In-Reply-To: Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org >From: "Andy Angrick" >Date: Wed, 13 Oct 1999 09:59:25 -0500 >I have an intermittent SCSI problem that doesn't seem to have a pattern. I'm >using 2.2.8.-RELEASE, adaptec 2940UW SCSI controller, and 2 compaq DGHS18Y >18GB SCSI drives (separate drives...no mirrors or RAID. Second drive is >mounted as /usr2). They have a 50-68 pin convertor on both of them. my >connector has 3 ends..3rd end is connected to an active terminator. At this point, even a crude ASCII diagram, showing the termination points, as well as active components on the SCSI chain, would be helpful. >The problem is that the system locks up and stops responding spiratically. >.... >Anyone have a clue as to what might be going on? If it was a cable issue, >you'd think that it would either work or it wouldn't..... No, I wouldn't think that. I would first suspect termination or cable. Each signal line needs to be terminated at each of its 2 ends. (The purpose is to reduce the strength of signals that are reflected off the end -- think of looking in a store window on a sunny day.) Don't forget to to check the termination on the host adaptor. Cheers, david -- David Wolfskill dhw@whistle.com UNIX System Administrator voice: (650) 577-7158 pager: (888) 347-0197 FAX: (650) 372-5915 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message