From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: Frequent SATA errors / port timeouts in 2.6.18.3? Date: Wed, 20 Dec 2006 09:42:47 +0900 Message-ID: <45888707.4010803@gmail.com> References: <4578F5D4.8080205@moniker.net> <4580907D.1020407@ucolick.org> <4587903C.3050204@gmail.com> <4588847E.3090303@ucolick.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from nz-out-0506.google.com ([64.233.162.227]:40715 "EHLO nz-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932721AbWLTAmy (ORCPT ); Tue, 19 Dec 2006 19:42:54 -0500 Received: by nz-out-0506.google.com with SMTP id s1so796247nze for ; Tue, 19 Dec 2006 16:42:53 -0800 (PST) In-Reply-To: <4588847E.3090303@ucolick.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Patrik Jonsson Cc: linux-ide@vger.kernel.org Patrik Jonsson wrote: > At the time it happened, none of the devices responded to smart commands > ("not an ATA device"). After resetting, they do. The outputs are at the > bottom. Hmmm... Nothing indicative of power problem. The first drive seems to have suffered quite some number of read failures due to bad sectors tho. >>> The drives contain science data for analysis, so it >>> would be a pain (though not a disaster) to lose it. Would it be >>> advisable to revert to the previous 2.6.17 that I was running before or >>> is this a problem that's fixed in a later kernel than the one I'm >>> running now? >>> >>> I did at the same time also install an Areca ARC1260 controller and >>> connected a bunch of drives to it, so another idea I had was cable >>> interference or something (there are now 18 drives in the machine). >>> >>> Any ideas or thought would be appreciated, >> Power quality degradation can cause transmission failures which can >> result in timeouts. How are your power lines hooked? > > The drives are connected to the Seasonic M12-600 PSU, connected to an > APC BackUPS and then it's in the wall. It's in a dedicated computer > room, but I'm not sure if the power in conditioned in any way. My primary suspect is still power. Please do one of the followings. * Buy an extra power and hang 2/3 of drives there. Just cheap 350w one should do. Using PS without mainboard attached is easy, google it. In my experience, single-lane 300 ~ 350w PS is better than 450w multilane one for this purpose. More juice on molex/SATA 12v. * If that's not an option, disconnect the extra drives and see how the system behaves. -- tejun