X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (mx1.hub.org [200.46.208.251]) by postgresql.org (Postfix) with ESMTP id 6E19D9FA261 for ; Tue, 9 May 2006 23:40:15 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.208.251]) (amavisd-new, port 10024) with ESMTP id 04048-06 for ; Tue, 9 May 2006 23:40:09 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey- Received: from floppy.pyrenet.fr (news.pyrenet.fr [194.116.145.2]) by postgresql.org (Postfix) with ESMTP id 2DE6C9F9DCD for ; Tue, 9 May 2006 23:40:08 -0300 (ADT) Received: by floppy.pyrenet.fr (Postfix, from userid 106) id 28B183090B; Wed, 10 May 2006 04:40:07 +0200 (MET DST) From: William Yu X-Newsgroups: pgsql.performance Subject: Re: Arguments Pro/Contra Software Raid Date: Tue, 09 May 2006 19:39:53 -0700 Organization: Hub.Org Networking Services Lines: 15 Message-ID: References: <473FC220-A52C-4954-81E9-A14ED33164C2@blighty.com> <4460BA8B.7010600@commandprompt.com> <5AF87D32-F602-4973-AA21-84E0CFEA1774@khera.org> 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: Thunderbird 1.5 (X11/20051201) In-Reply-To: To: pgsql-performance@postgresql.org X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200605/203 X-Sequence-Number: 18990 William Yu wrote: > We upgraded our disk system for our main data processing server earlier > this year. After pricing out all the components, basically we had the > choice of: > > LSI MegaRaid 320-2 w/ 1GB RAM+BBU + 8 15K 150GB SCSI > > or > > Areca 1124 w/ 1GB RAM+BBU + 24 7200RPM 250GB SATA My mistake -- I keep doing calculations and they don't add up. So I looked again on pricewatch and it turns out the actual comparison was for 4 SCSI drives, not 8! ($600 for a 15K 145GB versus $90 for a 7200 250GB.) No wonder our decision seemed to much more decisive back then.