Received: from maia.hub.org (unknown [200.46.208.211]) by mail.postgresql.org (Postfix) with ESMTP id 5CF70632697 for ; Fri, 9 Apr 2010 03:39:03 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.208.211]) (amavisd-maia, port 10024) with ESMTP id 31661-02 for ; Fri, 9 Apr 2010 06:38:48 +0000 (UTC) X-Greylist: delayed 00:05:09.673679 by SQLgrey-1.7.6 Received: from shrek.krogh.cc (2605ds1-ynoe.0.fullrate.dk [90.184.12.24]) by mail.postgresql.org (Postfix) with ESMTP id 41FAC632341 for ; Fri, 9 Apr 2010 03:38:02 -0300 (ADT) Received: from localhost (localhost [127.0.0.1]) by shrek.krogh.cc (Postfix) with ESMTP id 8593E2CE40C for ; Fri, 9 Apr 2010 08:32:49 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at shrek.krogh.cc Received: from shrek.krogh.cc ([127.0.0.1]) by localhost (shrek.krogh.cc [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id H7-rGtoKLnZQ for ; Fri, 9 Apr 2010 08:32:39 +0200 (CEST) Received: from [90.184.13.151] (2605ds1-ynoe.2.fullrate.dk [90.184.13.151]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: jesper@krogh.cc) by shrek.krogh.cc (Postfix) with ESMTPSA id 7524E2CE54A for ; Fri, 9 Apr 2010 08:32:39 +0200 (CEST) Message-ID: <4BBECA06.40602@krogh.cc> Date: Fri, 09 Apr 2010 08:32:38 +0200 From: Jesper Krogh User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100404 Thunderbird/3.0.4 MIME-Version: 1.0 To: pgsql-performance@postgresql.org Subject: Re: 3ware vs. MegaRAID References: <4BB1FAAF.7050406@wp.pl> <4BB23254.2040109@2ndquadrant.com> <4BBB662C.8030102@wp.pl> <23D26E38-9852-4EB6-9DF9-FCB2EAE1EE6C@richrelevance.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-0.776 tagged_above=-10 required=5 tests=AWL=-0.776 X-Spam-Level: X-Archive-Number: 201004/112 X-Sequence-Number: 38362 On 2010-04-08 05:44, Dave Crooke wrote: > For a card level RAID controller, I am a big fan of the LSI 8888, which is > available in a PCIe riser form factor for blade / 1U servers, and comes with > 0.5GB of battery backed cache. Full Linux support including mainline kernel > drivers and command line config tools. Was using these with SAS expanders > and 48x 1TB SATA-300 spindles per card, and it was pretty (adjective) quick > for a card-based system ... comparable with a small FC-AL EMC Clariion CX3 > series in fact, just without the redundancy. > Can someone shed "simple" light on an extremely simple question. How do you physicallly get 48 drives attached to an LSI that claims to only have 2 internal and 2 external ports? (the controller claims to support up to 240 drives). I'm currently looking at getting a server with space for 8 x 512GB SSDs running raid5 (or 6) and are looking for an well performing controller with BBWC for the setup. So I was looking for something like the LSI888ELP. -- Jesper