Received: from localhost (unknown [200.46.204.183]) by postgresql.org (Postfix) with ESMTP id 7D5772E0127 for ; Wed, 12 Mar 2008 17:08:53 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.183]) (amavisd-maia, port 10024) with ESMTP id 76616-04 for ; Wed, 12 Mar 2008 17:08:42 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey-1.7.5 Received: from westnet.com (westnet.com [216.187.52.2]) by postgresql.org (Postfix) with ESMTP id D5C5B2E0126 for ; Wed, 12 Mar 2008 17:08:42 -0300 (ADT) Received: from westnet.com (localhost [127.0.0.1]) by westnet.com (8.14.0/8.14.0) with ESMTP id m2CK8f6E004993; Wed, 12 Mar 2008 16:08:41 -0400 (EDT) Received: from localhost (gsmith@localhost) by westnet.com (8.14.0/8.13.2/Submit) with ESMTP id m2CK8fGF004990; Wed, 12 Mar 2008 16:08:41 -0400 (EDT) X-Authentication-Warning: westnet.com: gsmith owned process doing -bs Date: Wed, 12 Mar 2008 16:08:41 -0400 (EDT) From: Greg Smith X-X-Sender: gsmith@westnet.com cc: Pascal Cohen , pgsql-performance Subject: Re: Hardware question for a DB server In-Reply-To: <1205349821.9048.1128.camel@archimedes> Message-ID: References: <47D827EB.3020105@wimba.com> <1205349821.9048.1128.camel@archimedes> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=0.139 tagged_above=0 required=5 tests=AWL=-1.442, MISSING_HEADERS=1.581 X-Spam-Level: X-Archive-Number: 200803/261 X-Sequence-Number: 29215 On Wed, 12 Mar 2008, Mark Lewis wrote: > One question that's likely going to be important depending on your > answers above is whether or not you're getting a battery-backed write > cache for that ServeRAID-8K. Apparently there's a 8k-l and an regular 8-k; the l doesn't have the cache, so if this one is a regular 8-k it will have 256MB and a battery. See http://www.redbooks.ibm.com/abstracts/TIPS0054.html?Open#ServeRAID-8k