From owner-freebsd-questions@FreeBSD.ORG Fri Feb 17 15:29:39 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 65D6416A420 for ; Fri, 17 Feb 2006 15:29:39 +0000 (GMT) (envelope-from marko@freebsd.org) Received: from pih-relay06.plus.net (pih-relay06.plus.net [212.159.14.133]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8853443D45 for ; Fri, 17 Feb 2006 15:29:37 +0000 (GMT) (envelope-from marko@freebsd.org) Received: from [80.229.231.20] (helo=[192.168.1.4]) by pih-relay06.plus.net with esmtp (Exim) id 1FA7Y7-0002lY-N0 for freebsd-questions@freebsd.org; Fri, 17 Feb 2006 15:29:35 +0000 Message-ID: <43F5EBE5.9000904@freebsd.org> Date: Fri, 17 Feb 2006 15:29:41 +0000 From: Mark Ovens User-Agent: Mail/News 1.6a1 (X11/20060123) MIME-Version: 1.0 To: freebsd-questions@freebsd.org References: <5063f1f750386be6ff253bc614ac096f@prodigy.net> <200601170337.57112.alfredofnl@tiscali.it> In-Reply-To: <200601170337.57112.alfredofnl@tiscali.it> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: 80 pin SCSI hard drives. X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 17 Feb 2006 15:29:39 -0000 Alfredo Finelli wrote: > I have 80 pin SCSI discs mounted in hot-swappable trays on a SCSI > backplane which takes care also of powering them up and of SCSI > termination. This is one way of using them. > > I also have the same drives in a different system connected to normal SCSI > LVD cable using small adaptors which have an 80 pin receptacle on one > side and a 68 pin SCSI connector plus 4 pin molex power connector on the > other, as well as jumpers to define SCSI id. In this second case you > have to provide the required termination of the SCSI bus (e.g. using the > right terminated SCSI cable). > So you can confirm that using these adaptors works OK? When I bought my SCSI drive (off eBay) there were more SCA drives for sale than 68-pin but doing some research about 80->68 pin adaptors I found a lot of people saying not to use them, including Adaptec: This from Adaptec's ASK knowledgebase http://tinyurl.com/b3ofa "Although there are adapters on the market converting 80 pin to 68 pin they are not supported by Adaptec or the hard drive manufacturers. These convertors can cause loss of signal integrity that may result in connectivity issues and data loss." This put me off getting a SCA drive. Now I'm looking for a another drive and SCA ones seem to be cheaper on eBay. Regards, Mark