Received: from localhost (unknown [200.46.204.183]) by mail.postgresql.org (Postfix) with ESMTP id 7A7F364FC40 for ; Mon, 24 Nov 2008 11:06:07 -0400 (AST) Received: from mail.postgresql.org ([200.46.204.86]) by localhost (mx1.hub.org [200.46.204.183]) (amavisd-maia, port 10024) with ESMTP id 35253-08 for ; Mon, 24 Nov 2008 11:06:04 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from web23608.mail.ird.yahoo.com (web23608.mail.ird.yahoo.com [87.248.115.51]) by mail.postgresql.org (Postfix) with SMTP id 6FEA764FC25 for ; Mon, 24 Nov 2008 11:06:04 -0400 (AST) Received: (qmail 19911 invoked by uid 60001); 24 Nov 2008 15:06:02 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.co.uk; h=X-YMail-OSG:Received:Date:From:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID; b=fc2C2pnmuWoYGB1usZsOWb8AinvHVbnXf8dap3sGY7aZjYab64jm2gYCgnwuEZUxBmfzLSkd8YCeXlmYmGvUsw4wRSTZZIFZFo0G1JhTJo0NsaTpMrI6htTDgigRDSL3EG4wEFZTsBODWeUfQvyzBfCr3FUivnj1UpsX8F9Ml5w=; X-YMail-OSG: hEDaTxQVM1kLDl75N2VRKWezo_1YS1lyGPIHztcg1_jcEd0eMXcldCddoClwSR7sbMFBIbGxEyNah4dmugUytAKgvBBD9OyVJBbFUx3eevVME8JDxgX1NE9yF3kJZ4NcigpLPjoMPyNExYuNL.a10g5u5V4kvl7SiY0Vn94991pZ0Q-- Received: from [83.166.184.142] by web23608.mail.ird.yahoo.com via HTTP; Mon, 24 Nov 2008 15:06:02 GMT Date: Mon, 24 Nov 2008 15:06:02 +0000 (GMT) From: Glyn Astill Subject: Re: Perc 3 DC To: Scott Marlowe Cc: Steve Clark , pgsql-performance@postgresql.org In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Message-ID: <193090.19304.qm@web23608.mail.ird.yahoo.com> X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=0 tagged_above=0 required=5 tests=none X-Spam-Level: X-Archive-Number: 200811/231 X-Sequence-Number: 31962 --- Scott Marlowe wrote: > > > > Yeah the battery is on there, and in the BIOS it says it's > "PRESENT" and the status is "GOOD". > > If I remember correctly, older LSI cards had pretty poor > performance > in RAID 1+0 (or any layered RAID really). Have you tried setting > up > RAID-1 pairs on the card and then striping them with the OS? > Not yet no, but that's a good suggestion and I do intend to give it a whirl. I get about 27MB/s from raid 1 (10 is about the same) so hopefully I can up the throughput to the speed of about one disk with sw raid. For kicks I did try raid 5 on it; 6.9MB/s made it hard to resist going to get the hammer, which is still a very attractive option.