From owner-freebsd-hackers@FreeBSD.ORG Sun Nov 16 00:30:39 2014 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 3D148351 for ; Sun, 16 Nov 2014 00:30:39 +0000 (UTC) Received: from smarthost1.sentex.ca (smarthost1.sentex.ca [IPv6:2607:f3e0:0:1::12]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "smarthost.sentex.ca", Issuer "smarthost.sentex.ca" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 06026C1A for ; Sun, 16 Nov 2014 00:30:38 +0000 (UTC) Received: from [IPv6:2607:f3e0:0:4:f025:8813:7603:7e4a] (saphire3.sentex.ca [IPv6:2607:f3e0:0:4:f025:8813:7603:7e4a]) by smarthost1.sentex.ca (8.14.9/8.14.9) with ESMTP id sAG0UbHx063701; Sat, 15 Nov 2014 19:30:37 -0500 (EST) (envelope-from mike@sentex.net) Message-ID: <5467F02F.3090304@sentex.net> Date: Sat, 15 Nov 2014 19:30:39 -0500 From: Mike Tancsa Organization: Sentex Communications User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 MIME-Version: 1.0 To: Zaphod Beeblebrox , FreeBSD Hackers Subject: Re: OT-ish SATA port replicators vs. SAS "expanders" References: In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.75 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 16 Nov 2014 00:30:39 -0000 On 11/15/2014 5:42 PM, Zaphod Beeblebrox wrote: > > The problem with the LSI 2008 is that it doesn't support SATA port > replicators (while it does support SAS expanders). > > What is the real difference? Is it possible to hack the driver to support > (obviously not booting from) SATA port replicators on the LSI? I cant speak to your expanders question, but we too have had too many issues with sata port multipliers. We are using a pair of LSI 9240-8i with the disks just in JBOD mode for ZFS and its been FAR more clean and easy to manage. Performance is excellent too. The cards can be had for ~$100 and expander cards about $150. Quite good performance too. # camcontrol devlist at scbus0 target 8 lun 0 (pass0,da0) at scbus0 target 9 lun 0 (pass1,da1) at scbus0 target 10 lun 0 (pass2,da2) at scbus0 target 11 lun 0 (pass3,da3) at scbus0 target 13 lun 0 (pass4,da4) at scbus0 target 15 lun 0 (pass5,da5) at scbus1 target 0 lun 0 (pass6,da6) at scbus1 target 1 lun 0 (pass7,da7) at scbus1 target 2 lun 0 (pass8,da8) at scbus1 target 3 lun 0 (pass9,da9) at scbus1 target 4 lun 0 (pass10,da10) at scbus1 target 5 lun 0 (pass11,da11) ---Mike -- ------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, mike@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada http://www.tancsa.com/