From owner-freebsd-current@FreeBSD.ORG Mon Aug 15 14:31:36 2005 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 226B416A41F; Mon, 15 Aug 2005 14:31:36 +0000 (GMT) (envelope-from scottl@samsco.org) Received: from pooker.samsco.org (pooker.samsco.org [168.103.85.57]) by mx1.FreeBSD.org (Postfix) with ESMTP id AB3C543D48; Mon, 15 Aug 2005 14:31:35 +0000 (GMT) (envelope-from scottl@samsco.org) Received: from [157.185.81.167] ([158.69.81.167]) (authenticated bits=0) by pooker.samsco.org (8.13.3/8.13.3) with ESMTP id j7FEgnOv039389; Mon, 15 Aug 2005 08:42:50 -0600 (MDT) (envelope-from scottl@samsco.org) Message-ID: <4300A73F.7080105@samsco.org> Date: Mon, 15 Aug 2005 10:31:27 -0400 From: Scott Long User-Agent: Mozilla Thunderbird 1.0.2 (Macintosh/20050317) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Andre Oppermann References: <43005F30.9000102@freebsd.org> <4300A2F8.5050207@samsco.org> <4300A637.4030807@freebsd.org> In-Reply-To: <4300A637.4030807@freebsd.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=0.0 required=3.8 tests=none autolearn=failed version=3.0.2 X-Spam-Checker-Version: SpamAssassin 3.0.2 (2004-11-16) on pooker.samsco.org Cc: freebsd-current@freebsd.org Subject: Re: SAS controllers and SATA tunneling X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Aug 2005 14:31:36 -0000 Andre Oppermann wrote: > Scott Long wrote: > >> Andre Oppermann wrote: >> >>> Does one of our SCSI-SAS controllers support multiplexors and >>> SATA tunneling (STP)? >>> >> >> No. Adding a SAS module to the MPT driver is probably the easiest >> option by far. SAS chips from Adaptec, Intel, Vitesse, and others >> likely do not have a FreeBSD driver nor the available documentation to >> write a FreeBSD driver. > > > Oops, how does our future look then? Are we going to be restricted to > SATA? I'd say in 2006 all new servers will be SAS-only. Old parallel > SCSI is dead. > Like I said, the mpt driver will be fairly easy and straight forward to add SAS and STP front ends. Their chips are also likely to be very decent. It's up to Vitesse/Adaptec whether or not they want to be relevant, though I guess that they won't care and it'll come down to someone slogging through a linux driver (if one is even released) to reverse engineer it. Intel is somewhat of an unknown quantity, though my guess is that you'll see what amounts to a winmodem-like chip that requires a huge complex driver. Another option would be to do what I wanted to do last year with extending the NDIS wrapper to cover Storport (and whatever the Longhorn follow-on is) so that Windows drivers can be used. Scott