X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (av.hub.org [200.46.204.144]) by postgresql.org (Postfix) with ESMTP id 0A8F89DCAB1 for ; Mon, 12 Dec 2005 19:12:09 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 45894-04 for ; Mon, 12 Dec 2005 19:12:11 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey- Received: from koolancexeon.g2switchworks.com (mail.g2switchworks.com [63.87.162.25]) by postgresql.org (Postfix) with ESMTP id A2EAB9DCAB5 for ; Mon, 12 Dec 2005 19:12:04 -0400 (AST) Received: mail.g2switchworks.com 10.10.1.8 from 10.10.1.37 10.10.1.37 via HTTP with MS-WebStorage 6.5.6944 Received: from state.g2switchworks.com by mail.g2switchworks.com; 12 Dec 2005 17:12:01 -0600 Subject: Re: opinion on disk speed From: Scott Marlowe To: Vivek Khera Cc: "J.AndrewRogers" , pgsql-performance@postgresql.org In-Reply-To: References: <3E73FEF8-DD9D-4DF7-9BB1-C020A4186296@khera.org> <1134069708.24172.8.camel@toonses.gghcwest.com> <47A29011-9F37-4DA6-A138-0CEE7DCBCBDE@khera.org> Content-Type: text/plain Content-Transfer-Encoding: 7bit Message-Id: <1134429121.3587.87.camel@state.g2switchworks.com> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 (1.4.6-2) Date: Mon, 12 Dec 2005 17:12:01 -0600 X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, score=0.001 required=5 tests=[UNPARSEABLE_RELAY=0.001] X-Spam-Score: 0.001 X-Spam-Level: X-Archive-Number: 200512/305 X-Sequence-Number: 16126 On Mon, 2005-12-12 at 16:19, Vivek Khera wrote: > On Dec 12, 2005, at 5:16 PM, J. Andrew Rogers wrote: > > > We've swapped out the DIMMs on MegaRAID controllers. Given the > > cost of a standard low-end DIMM these days (which is what the LSI > > controllers use last I checked), it is a very cheap upgrade. > > What's the max you can put into one of these cards? I haven't been > able to find docs on which specific DIMM type they use... I found the manual for the 4 port U320 SCSI controller, and it listed 256 Meg for single data rate DIMM, and 512 Meg for DDR DIMM. This was on the lsi at: http://www.lsilogic.com/files/docs/techdocs/storage_stand_prod/RAIDpage/mr_320_ug.pdf I believe. They've got a new one coming out, that's SAS, like SCSI on SATA or something. It comes with 256Meg, removeable, but doesn't yet say what the max size it. I'd love to have one of these that could hold a couple of gigs for a TPC type test.