From owner-freebsd-fs@FreeBSD.ORG Wed Feb 5 14:46:58 2014 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id C4282712 for ; Wed, 5 Feb 2014 14:46:58 +0000 (UTC) Received: from mail.physics.umn.edu (smtp.spa.umn.edu [128.101.220.4]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 915BB11C1 for ; Wed, 5 Feb 2014 14:46:58 +0000 (UTC) Received: from c-66-41-25-68.hsd1.mn.comcast.net ([66.41.25.68] helo=[192.168.0.138]) by mail.physics.umn.edu with esmtpsa (TLSv1:CAMELLIA256-SHA:256) (Exim 4.77 (FreeBSD)) (envelope-from ) id 1WB3kY-0001eK-HF; Wed, 05 Feb 2014 08:46:55 -0600 Message-ID: <52F24ED1.1010300@physics.umn.edu> Date: Wed, 05 Feb 2014 08:46:41 -0600 From: Graham Allan User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: Rich , Daniel Kalchev References: <52F1BDA4.6090504@physics.umn.edu> <7D20F45E-24BC-4595-833E-4276B4CDC2E3@gmail.com> <52F1DEBC.9020304@digsys.bg> <52F1FBBA.1000909@digsys.bg> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on mrmachenry.spa.umn.edu X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED autolearn=unavailable version=3.3.2 Subject: Re: practical maximum number of drives X-SA-Exim-Version: 4.2 Cc: freebsd-fs X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 05 Feb 2014 14:46:58 -0000 Is this difference not just because the 8e has two SAS buses and the 4i only one? So they are claiming a consistent 256 devices per bus. We are using the 9200-8e, and our drives are split across both buses. Do you have >256 drives on a single HBA yourself? Graham On 2/5/2014 3:24 AM, Rich wrote: > http://www.lsi.com/products/host-bus-adapters/pages/lsi-sas-9200-8e.aspx > > Claims 512. > > http://www.lsi.com/products/host-bus-adapters/pages/lsi-sas-9211-4i.aspx > > claims 256. > > I'm really extraordinarily curious to see what would happen, but do > not have >512 unused drives I could attach to a single HBA to find > out...easily. > > I have >256, but since all the stuff I can find other than SM's > documentation claims 512 for the SAS2008, that would only refute their > statement, not LSI's.