From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marty Subject: Re: possible ATA hang in 2.6.32-rc6 Date: Wed, 11 Nov 2009 08:04:49 -0500 Message-ID: <4AFAB671.9060908@ix.netcom.com> References: <4AF5ADA3.3070000@ix.netcom.com> <4AF7E20A.20005@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from elasmtp-masked.atl.sa.earthlink.net ([209.86.89.68]:47817 "EHLO elasmtp-masked.atl.sa.earthlink.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751405AbZKKNEx (ORCPT ); Wed, 11 Nov 2009 08:04:53 -0500 In-Reply-To: <4AF7E20A.20005@kernel.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tejun Heo Cc: jgarzik@pobox.com, linux-ide@vger.kernel.org, User discussion about IVTV Tejun Heo wrote: > Hello, Marty. > > Marty wrote: >> I got two hard hangs in 2.6.32-rc5 and rc6 in an Asrock A780GXE/128M >> with AMD 780G+SB700 chipsets, resulting in no response to magic alt-sysreq. >> The first hang left no log clues. The second was closely but not >> immediately preceeded by syslog ATA error messages (see excerpt). > The ata error messages indicate transmission problems. The fact that ... > they're pretty close to each other is interesting and seems to point > to hardware problem (most likely power fluctuation). Thanks for the reply. I think you are right about power. Subsequent hangs seem to indicate a problem with the mains. In the last hang, the (offline) UPS briefly switched to battery, and another system has had the same problem.