From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: Strange arbitrary port resets on ICH9R with Seagate drives Date: Sat, 20 Oct 2007 11:25:42 +0900 Message-ID: <47196726.8@gmail.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from rv-out-0910.google.com ([209.85.198.187]:42120 "EHLO rv-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751677AbXJTCZs (ORCPT ); Fri, 19 Oct 2007 22:25:48 -0400 Received: by rv-out-0910.google.com with SMTP id k20so624500rvb for ; Fri, 19 Oct 2007 19:25:47 -0700 (PDT) In-Reply-To: Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Jonathan Bell Cc: "linux-ide@vger.kernel.org" Jonathan Bell wrote: > On Mon, 01 Oct 2007 01:30:59 +0100, Jonathan Bell > wrote: > >> Hello >> >> I've just purchased a brand spanking new G33/ICH9R based system for >> use as a home fileserver with 4x ST3750840AS Seagate SATA drives as >> the main grunt drives. >> >> The problem is that all of the seagate drives keep resetting, as this >> dmesg excerpt shows: > > Oops. Hardware problem. Insufficient power applied to the hotswap caddy > resulted in the drives bugging out when all 4 were accessed, hence > cat/dd on an individual drive caused no problems. > > Now running these drives quite successfully in raid-5 with NCQ and > 3.0Gbps links. Yeah, this kind of problem is pretty common and difficult to debug. It just seems SATA link is very sensitive to power quality and sucky power supplies are easy to come by. -- tejun