X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (av.hub.org [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id A321FDB4C2 for ; Thu, 17 Nov 2005 08:28:42 -0400 (AST) Received: from svr1.postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 28712-06 for ; Thu, 17 Nov 2005 12:28:44 +0000 (GMT) X-Greylist: from auto-whitelisted by SQLgrey- Received: from floppy.pyrenet.fr (news.pyrenet.fr [194.116.145.2]) by svr1.postgresql.org (Postfix) with ESMTP id 39948DB4CF for ; Thu, 17 Nov 2005 08:28:39 -0400 (AST) Received: by floppy.pyrenet.fr (Postfix, from userid 106) id DDD9031059; Thu, 17 Nov 2005 13:28:41 +0100 (MET) From: William Yu X-Newsgroups: pgsql.performance Subject: Re: Hardware/OS recommendations for large databases ( Date: Thu, 17 Nov 2005 04:28:38 -0800 Organization: Hub.Org Networking Services Lines: 19 Message-ID: References: <2F769A036C2082469C3A4BF2603694C601E7686E@ex2k.bankofamerica.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@news.hub.org User-Agent: Mozilla Thunderbird 1.0 (X11/20041206) X-Accept-Language: en-us, en In-Reply-To: <2F769A036C2082469C3A4BF2603694C601E7686E@ex2k.bankofamerica.com> To: pgsql-performance@postgresql.org X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, score=0 required=5 tests=[AWL=0.000] X-Spam-Score: 0 X-Spam-Level: X-Archive-Number: 200511/314 X-Sequence-Number: 15571 Welty, Richard wrote: > David Boreham wrote: > >>I guess I've never bought into the vendor story that there are >>two reliability grades. Why would they bother making two >>different kinds of bearing, motor etc ? Seems like it's more >>likely an excuse to justify higher prices. > > > then how to account for the fact that bleeding edge SCSI drives > turn at twice the rpms of bleeding edge consumer drives? The motors spin twice as fast? I'm pretty sure the original comment was based on drives w/ similar specs. E.g. 7200RPM "enterprise" drives versus 7200RPM "consumer" drives. Next time one of my 7200RPM SCSIs fail, I'll take it apart and compare the insides to an older 7200RPM IDE from roughly the same era.