From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerhard Wiesinger Subject: Re: Lots of con-current I/O = resets SATA link? (2.6.25.10) Date: Sat, 12 Jul 2008 10:29:59 +0200 (CEST) Message-ID: References: Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Return-path: Received: from chello212186124096.11.vie.surfer.at ([212.186.124.96]:38222 "EHLO wiesinger.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750902AbYGLIao (ORCPT ); Sat, 12 Jul 2008 04:30:44 -0400 In-Reply-To: Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Justin Piszcz Cc: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, linux-ide@vger.kernel.org On Wed, 9 Jul 2008, Gerhard Wiesinger wrote: > On Tue, 8 Jul 2008, Justin Piszcz wrote: > >>>>>> Hi Gerhard, >>>> >>>> Please run: >>>> >>>> smartctl -t short /dev/sdc >>>> sleep 300 >>>> smartctl -t long /dev/sdc >>>> >>>> Wait 2-3 hours or more and: >>>> >>>> smartctl -a /dev/sdc >>> >>> >>> I'm changing the disk one more time ... >> >> Once you replace the disk please re-run the tests shown above and show us >> the output please. >> >> How many SAMSUNG disks have you gone through, do they really fail that >> often? >> > > Hello Justin! > > Setup Power suppply: > sda-sdd are on the same power supply cable, sde, sdf are on a second one. > > I changed the disk to a new SAMSUNG disk and the first raid resync did NOT > work and I had 1 reallocated sector ... > > Also the RMA guy at our very good computer store (http://www.ditech.at/) were > helpfull in changing the disks and he hates the SAMSUNG disks because of high > RMA rates ... > > But: > smart checks were ok (details see below). The smart checks are shown as > aborted, but before running the next tests they were at "Completed without > error" (strange). > > Now sdc has it's own power cable and I'm running a raid resync now. > > Power supply is: > ATX 385 Watt, ENERMAX PRO82+ > > Load on power supply measured on 220V side with a true RMS Wattmeter: > Power off: 6,5W > Max seen at power up: 196W > BIOS: 114,1W > Linux idle: 92,0W > 100% Disk I/O, 100% CPU load: 149,6W > => Everything fine and as expected. > > I'll keep you up to date ... > Hello! It looks like it works now without any problems: *) Serveral RAID checks (once a day) *) smartctl checks were fine *) Only one reallocated sector *) Writing the disk full with random data So the possibilities for the fault are: *) SATA power connector (most likely I would guess) *) 4th disk is now ok *) Other 220V power cable connector through the Wattmeter Ciao, Gerhard -- http://www.wiesinger.com/