Received: from maia.hub.org (maia-5.hub.org [200.46.204.29]) by mail.postgresql.org (Postfix) with ESMTP id 41B4DB5DBDD for ; Tue, 21 Jun 2011 01:04:26 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.29]) (amavisd-maia, port 10024) with ESMTP id 27193-02 for ; Tue, 21 Jun 2011 04:04:20 +0000 (UTC) X-Greylist: delayed 00:09:50.460947 by SQLgrey-1.7.6 Received: from crestone.coronasolutions.com (crestone.coronasolutions.com [66.45.104.24]) by mail.postgresql.org (Postfix) with ESMTP id 37575B5DBD3 for ; Tue, 21 Jun 2011 01:04:20 -0300 (ADT) Received: from localhost (localhost.localdomain [127.0.0.1]) by crestone.coronasolutions.com (Postfix) with ESMTP id C704D4E1AC for ; Mon, 20 Jun 2011 21:54:27 -0600 (MDT) X-Virus-Scanned: Debian amavisd-new at coronasolutions.com Received: from crestone.coronasolutions.com ([127.0.0.1]) by localhost (crestone.coronasolutions.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id a9gZGecfbLJw for ; Mon, 20 Jun 2011 21:54:26 -0600 (MDT) Received: from dan-harriss-macbook-pro.local (unknown [10.1.250.14]) by crestone.coronasolutions.com (Postfix) with ESMTP id 793E04E1AB for ; Mon, 20 Jun 2011 21:54:26 -0600 (MDT) Message-ID: <4E0015F2.9060504@drivefaster.net> Date: Mon, 20 Jun 2011 21:54:26 -0600 From: Dan Harris User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.17) Gecko/20110414 Thunderbird/3.1.10 MIME-Version: 1.0 To: pgsql-performance@postgresql.org Subject: Contemplating SSD Hardware RAID 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: 201106/190 X-Sequence-Number: 44123 I'm looking for advice from the I/O gurus who have been in the SSD game for a while now. I understand that the majority of consumer grade SSD drives lack the required capacitor to complete a write on a sudden power loss. But, what about pairing up with a hardware controller with BBU write cache? Can the write cache be disabled at the drive and result in a safe setup? I'm exploring the combination of an Areca 1880ix-12 controller with 6x OCZ Vertex 3 V3LT-25SAT3 2.5" 240GB SATA III drives in RAID-10. Has anyone tried this combination? What nasty surprise am I overlooking here? Thanks -Dan