From owner-freebsd-hardware Fri Aug 11 0:40:14 2000 Delivered-To: freebsd-hardware@freebsd.org Received: from mail2.rdc2.pa.home.com (mail2.rdc2.pa.home.com [24.12.106.241]) by hub.freebsd.org (Postfix) with ESMTP id 2FEB237BF5F for ; Fri, 11 Aug 2000 00:40:12 -0700 (PDT) (envelope-from garycor@home.com) Received: from home.com ([24.3.185.85]) by mail2.rdc2.pa.home.com (InterMail vM.4.01.03.00 201-229-121) with ESMTP id <20000811074011.VJQU10086.mail2.rdc2.pa.home.com@home.com>; Fri, 11 Aug 2000 00:40:11 -0700 Message-ID: <3993AD38.29D3B47B@home.com> Date: Fri, 11 Aug 2000 03:37:28 -0400 From: "Gary T. Corcoran" X-Mailer: Mozilla 4.7 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Francisco Reyes Cc: Michael VanLoon , FreeBSD Hardware List Subject: Re: Best behaved drives for FreeBSD? References: <200008110717.DAA11000@sanson.reyes.somos.net> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Francisco Reyes wrote: > > On Fri, 11 Aug 2000 00:14:42 -0700, Michael VanLoon wrote: > > >Actually, from what I understand, the cables from ATA33 and lower are > >different from the ATA66 cable, and the ATA66 cable is also used by ATA100. > >I'm not an expert on this, however. > > I got a good reply yesterday that explained this. > ATA66 drives need different cables from ATA33 to work on ATA66 True. > ATA100 drives need yet different cables from ATA33 and ATA66 > > ATA100 drives will work with ATA66 cables, but will downgrade to > ATA66 speeds. I don't think so. My understanding is that ATA100 uses the *same* cables as ATA66 - they were just able to squeeze another 33MHz of performance out of them. In other words, Michael VanLoon was correct. It's only if you use an ATA66 *controller* that the ATA100 drives will downgrade to ATA66 speeds, transparently. > Don't really know about ATA33 cables, but I think they have a > different number of pins. No, same number of pins. It's just that the ATA66/100 cables have 40 ground wires, a total of 80 *wires* in the cable, connected to the same 40 pin connectors, versus the 40 wires connected to 40 pins in the ATA33 cables... Gary To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message