From owner-freebsd-fs@FreeBSD.ORG  Wed Feb  5 14:25:31 2014
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
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 20DD88D9
 for <freebsd-fs@freebsd.org>; Wed,  5 Feb 2014 14:25:31 +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 E36E41E52
 for <freebsd-fs@freebsd.org>; Wed,  5 Feb 2014 14:25:30 +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 <allan@physics.umn.edu>)
 id 1WB3Pr-0000r6-S1
 for freebsd-fs@freebsd.org; Wed, 05 Feb 2014 08:25:28 -0600
Message-ID: <52F249D1.50109@physics.umn.edu>
Date: Wed, 05 Feb 2014 08:25:21 -0600
From: Graham Allan <allan@physics.umn.edu>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64;
 rv:24.0) Gecko/20100101 Thunderbird/24.2.0
MIME-Version: 1.0
To: freebsd-fs@freebsd.org
References: <52F1BDA4.6090504@physics.umn.edu>
 <7D20F45E-24BC-4595-833E-4276B4CDC2E3@gmail.com> <52F1DEBC.9020304@digsys.bg>
In-Reply-To: <52F1DEBC.9020304@digsys.bg>
Content-Type: text/plain; charset=windows-1252; 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
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs/>
List-Post: <mailto:freebsd-fs@freebsd.org>
List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 05 Feb 2014 14:25:31 -0000

dmesg reports a 2308 if that makes any difference.

This is using these 45-bay Supermicro chassis, where front and back are 
separate backplanes, so the front drives are on one bus and the back 
drives on another. That's a detail which I forgot in my first post - so 
although it's one HBA, the drives are split across both ports.

Graham

On 2/5/2014 12:48 AM, Daniel Kalchev wrote:
> I also wonder how you managed to go over the LSI2008's limit of 112
> drives...