From owner-freebsd-scsi Thu Oct 28 10:17:35 1999 Delivered-To: freebsd-scsi@freebsd.org Received: from panzer.kdm.org (panzer.kdm.org [216.160.178.169]) by hub.freebsd.org (Postfix) with ESMTP id 0ADBD14C34; Thu, 28 Oct 1999 10:17:25 -0700 (PDT) (envelope-from ken@panzer.kdm.org) Received: (from ken@localhost) by panzer.kdm.org (8.9.3/8.9.1) id LAA17567; Thu, 28 Oct 1999 11:17:18 -0600 (MDT) (envelope-from ken) Message-Id: <199910281717.LAA17567@panzer.kdm.org> Subject: Re: Tekram DC 395 In-Reply-To: from Chris Dillon at "Oct 28, 1999 11:32:59 am" To: cdillon@wolves.k12.mo.us (Chris Dillon) Date: Thu, 28 Oct 1999 11:17:18 -0600 (MDT) Cc: jean-philipe.boisseau@sextant.thomson-csf.com (BOISSEAU Jean-Philippe), freebsd-hardware@FreeBSD.ORG, nsouch@FreeBSD.ORG, freebsd-scsi@FreeBSD.ORG From: "Kenneth D. Merry" X-Mailer: ELM [version 2.4ME+ PL54 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Chris Dillon wrote... > On Wed, 27 Oct 1999, Kenneth D. Merry wrote: > > > Tekram is to be commended for putting forth the effort to support FreeBSD. > > They have actually written three different FreeBSD/CAM drivers -- one for > > their AMD 53c974 boards (the amd driver in the tree is based on that > > driver), one for their NCR/Symbios boards, and now one for their own SCSI > > chips. > > I've always been happy with my Tekram DC-390F, which is based on the > NCR/Symbios 53c875. I've also got a bunch of Compaq servers with > integrated 53c875's which work flawlessly with FreeBSD as well. How > do these new chips apparently made by Tekram compare to the Symbios > and even Adaptec chips as far as performance and reliability go? If > they're at least as good, or better, I'll probably invest in another > Tekram card when I decide to get some U2 devices. Well, I have no idea how the chips or driver perform. One thing to keep in mind, though, is that either the chip doesn't have a SCSI phase engine, or the driver isn't written to take advantage of it. It does all of its own phase transitions, like the AMD 53c974 and Adaptec 6360 drivers. (They have to.) In any case, their TRM-S1040 chip only does ultra-wide, not Ultra 2. So if you want to do Ultra 2 with a Tekram board, you'll need to get the DC-390U2, and I would recommend using Gerard's sym driver instead of the stock NCR driver. Ken -- Kenneth Merry ken@kdm.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message