Received: from maia.hub.org (maia-2.hub.org [200.46.204.251]) by mail.postgresql.org (Postfix) with ESMTP id ADEF4B5DBD8 for ; Mon, 22 Aug 2011 23:42:38 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.251]) (amavisd-maia, port 10024) with ESMTP id 93221-06 for ; Tue, 23 Aug 2011 02:42:31 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from mail.nuevasync.com (server13-scl.nuevasync.com [64.13.157.153]) by mail.postgresql.org (Postfix) with ESMTP id 63D13B5DBBE for ; Mon, 22 Aug 2011 23:42:29 -0300 (ADT) Received: from [69.145.82.243] (unknown [69.145.82.243]) by mail.nuevasync.com (Postfix) with ESMTP id 56F252B143D for ; Mon, 22 Aug 2011 20:42:28 -0600 (MDT) Message-ID: <4E5313B0.6000004@boreham.org> Date: Mon, 22 Aug 2011 20:42:56 -0600 From: David Boreham User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0) Gecko/20110812 Thunderbird/6.0 MIME-Version: 1.0 To: PGSQL Performance Subject: RAID Controllers Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-1.9 tagged_above=-10 required=5 tests=BAYES_00=-1.9 X-Spam-Level: X-Archive-Number: 201108/248 X-Sequence-Number: 44695 I'm buying a bunch of new machines (all will run an application that heavily writes to PG). These machines will have 2 spindle groups in a RAID-1 config. Drives will be either 15K SAS, or 10K SATA (I haven't decided if it is better to buy the faster drives, or drives that are identical to the ones we are already running in our production servers, thus achieving commonality in spares across all machines). Controller choice looks to be between Adaptec 6405, with the supercapacitor unit; or LSI 9260-4i with its BBU. Price is roughly the same. Would be grateful for any thoughts on this choice. Thanks.