Received: from localhost (unknown [200.46.204.182]) by postgresql.org (Postfix) with ESMTP id D213B2E0070 for ; Thu, 17 Jan 2008 19:23:55 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.182]) (amavisd-maia, port 10024) with ESMTP id 05373-05 for ; Thu, 17 Jan 2008 19:23:46 -0400 (AST) Received: from westnet.com (westnet.com [216.187.52.2]) by postgresql.org (Postfix) with ESMTP id D97A92E34D2 for ; Thu, 17 Jan 2008 19:23:49 -0400 (AST) Received: from westnet.com (localhost [127.0.0.1]) by westnet.com (8.14.0/8.14.0) with ESMTP id m0HNNm0O024769; Thu, 17 Jan 2008 18:23:48 -0500 (EST) Received: from localhost (gsmith@localhost) by westnet.com (8.14.0/8.13.2/Submit) with ESMTP id m0HNNlvZ024763; Thu, 17 Jan 2008 18:23:47 -0500 (EST) X-Authentication-Warning: westnet.com: gsmith owned process doing -bs Date: Thu, 17 Jan 2008 18:23:47 -0500 (EST) From: Greg Smith X-X-Sender: gsmith@westnet.com cc: Sean Davis , pgsql-performance@postgresql.org Subject: Re: [OT] RAID controllers blocking one another? In-Reply-To: Message-ID: References: <264855a00801171217m4e6211e6y5f4d0e12ce86db5c@mail.gmail.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200801/141 X-Sequence-Number: 28380 On Thu, 17 Jan 2008, Scott Marlowe wrote: > On Jan 17, 2008 2:17 PM, Sean Davis wrote: >> two3-ware cards, one 9640SE-24 and one 9640SE-16 > Sounds like they're sharing something they shouldn't be. I'm not real > familiar with PCI-express. Aren't those the ones that use up to 16 > channels for I/O? Can you divide it to 8 and 8 for each PCI-express > slot in the BIOS maybe, or something like that? I can't find the 9640SE-24/16 anywhere, but presuming these are similar to (or are actually) the 9650SE cards then each of them is using 8 lanes of the 16 available. I'd need to know the exact motherboard or system to even have a clue what the options are for adjusting the BIOS and whether they are shared or independant. But I haven't seen one where there's any real ability to adjust how the I/O is partitioned beyond adjusting what slot you plug things into so that's probably a dead end anyway. Given the original symptoms, one thing I would be suspicious of though is whether there's some sort of IRQ conflict going on. Sadly we still haven't left that kind of junk behind even on current PC motherboards. -- * Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD