From owner-freebsd-scsi Tue Nov 14 0:12:43 2000 Delivered-To: freebsd-scsi@freebsd.org Received: from goliath.siemens.de (goliath.siemens.de [194.138.37.131]) by hub.freebsd.org (Postfix) with ESMTP id 9CDF737B689 for ; Tue, 14 Nov 2000 00:12:39 -0800 (PST) X-Envelope-Sender-Is: andre.albsmeier@mchp.siemens.de (at relayer goliath.siemens.de) Received: from mail1.siemens.de (mail1.siemens.de [139.23.33.14]) by goliath.siemens.de (8.11.0/8.11.0) with ESMTP id eAE8COl17841; Tue, 14 Nov 2000 09:12:25 +0100 (MET) Received: from curry.mchp.siemens.de (curry.mchp.siemens.de [139.25.42.7]) by mail1.siemens.de (8.11.0/8.11.0) with ESMTP id eAE8CO112150; Tue, 14 Nov 2000 09:12:24 +0100 (MET) Received: (from localhost) by curry.mchp.siemens.de (8.11.1/8.11.1) id eAE8COo39857; Date: Tue, 14 Nov 2000 09:12:23 +0100 From: Andre Albsmeier To: Olivier Nicole Cc: andre.albsmeier@mchp.siemens.de, sthaug@nethelp.no, freebsd-scsi@FreeBSD.ORG Subject: Re: Slightly OT: Standard LVD and Ultra 160 cables Message-ID: <20001114091223.A20577@curry.mchp.siemens.de> References: <20001114082801.A18468@curry.mchp.siemens.de> <87750.974188322@verdi.nethelp.no> <20001114085524.A20142@curry.mchp.siemens.de> <200011140801.PAA07344@banyan.cs.ait.ac.th> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <200011140801.PAA07344@banyan.cs.ait.ac.th>; from on@cs.ait.ac.th on Tue, Nov 14, 2000 at 03:01:59PM +0700 X-Echelon: BND CIA NSA Mossad KGB MI6 IRA detonator nuclear assault strike Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Tue, 14-Nov-2000 at 15:01:59 +0700, Olivier Nicole wrote: > The problem could be the SCSI case tho. > > I think there are not much difference between a U2 and U160 SCSI > cacble, only the latest has more strict characteristics (like Cat5 > Ethernet cable opposed at Cat 5 E). > > With a short cable, just any cable will do, with long cable or bad > luck it becomes very strict on the type of cable/connectors. > > Now is the transfer rate exactelly 80MB/s? If this is the exact > figure, I would suspect a miss configuration somewhere, one of the > device is not U160. OK, this is the configuration: 2m cable 29160 ------------- SCSI case - Terminator In the SCSI case there are about 2m cable again with 8 connectors. Three of them are used with IBM DDYS-T18350N S93E drives. So we have a total of three IBM DDYS-T18350N S93E drives on a 4m cable. This should be well within the spec. I used to run them with 160MB/s but experienced problems under load. Now I have set the speed to 80MB/s in the Adaptec BIOS and the systems runs without any problem. The case is told to be 160MB/s capable but the cable now appears in the dealers catalog as a 80MB/s type. It was 160MB/s before :-( -Andre To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message