From owner-freebsd-current@FreeBSD.ORG Wed Oct 10 14:18:10 2007 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6F78316A46E for ; Wed, 10 Oct 2007 14:18:10 +0000 (UTC) (envelope-from bp@barryp.org) Received: from eden.barryp.org (host-42-60-230-24.midco.net [24.230.60.42]) by mx1.freebsd.org (Postfix) with ESMTP id 4525513C4EB for ; Wed, 10 Oct 2007 14:18:09 +0000 (UTC) (envelope-from bp@barryp.org) Received: from geo.med.und.nodak.edu ([134.129.166.11]) by eden.barryp.org with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.67 (FreeBSD)) (envelope-from ) id 1IfcNz-000A8o-Mn; Wed, 10 Oct 2007 09:18:08 -0500 Message-ID: <470CDF1D.5050707@barryp.org> Date: Wed, 10 Oct 2007 09:18:05 -0500 From: Barry Pederson User-Agent: Thunderbird 2.0.0.6 (X11/20070728) MIME-Version: 1.0 To: Martin Nilsson References: <46A7B47F.3050300@berkeley.edu> <46A7B607.2070207@samsco.org> <20070927010139.GC22695@eschew.pusen.org> <46FF4E9B.3080104@gneto.com> In-Reply-To: <46FF4E9B.3080104@gneto.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-current@freebsd.org Subject: Re: Are SATA port multipliers supported in -CURRENT? 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: Wed, 10 Oct 2007 14:18:10 -0000 Martin Nilsson wrote: > Hi, > > Have you looked at the Supermicro CSE-836E1 chassis? > http://www.supermicro.com/products/chassis/3U/836/SC836E1-R800V.cfm > > It is also 3U but have space for 16 drives redundant power and the > computer! The port expander works with the LSI MegaRAID SAS8308ELP board > and SAS/SATA drives in FreeBSD. There is also a cheaper model available > with 16 normal SATA connectors if you prefer that. I've been pondering this chassis too, and have been wondering how the FreeBSD mpt driver would react to the builtin SAS expander. I've been using SAS3041E-R cards (cheaper than the MegaRAIDs) with drives plugged straight into them very happily. Would that same 4-port card plugged into a that chassis' expander simply see 16 sata drives as da0..da15? It looks like these chassis actually have 28-port expanders, with 4 ports going in, 16 ports for drives, and 2 4-port groups for daisy-chaining other chassis. Any idea if another connected chassis full of drives would just show up as da16..da31 and so on? Barry