From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Janos Haar" Subject: Re: possible data corruption on ICH8 or WD raptor Date: Fri, 1 Aug 2008 12:40:04 +0200 Message-ID: <037e01c8f3c2$f81c5330$0400a8c0@dcccs> References: <0b8b01c8e5fb$65ed9480$0400a8c0@dcccs> <48929113.4020402@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-2"; reply-type=original Content-Transfer-Encoding: 7bit Return-path: Received: from ns.netcenter.hu ([195.228.254.57]:40845 "EHLO netcenter.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752906AbYHAK61 (ORCPT ); Fri, 1 Aug 2008 06:58:27 -0400 Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tejun Heo Cc: linux-ide@vger.kernel.org ----- Original Message ----- From: "Tejun Heo" To: "Janos Haar" Cc: Sent: Friday, August 01, 2008 6:29 AM Subject: Re: possible data corruption on ICH8 or WD raptor > Janos Haar wrote: >> Hello list, >> >> I have one (planned) production ready server with DP35DP Intel >> motherboard, and 6 drive. >> >> 2x 500GB WD SATA (not interesting) >> 4x 300GB WD Velociraptor, SATA2 >> >> When i have tested the server i see one error report on the dmesg: >> >> ata3.00: exception Emask 0x10 SAct 0x0 SErr 0x4010000 action 0xa frozen >> ata3.00: irq_stat 0x00400040, connection status changed >> ata3: SError: { PHYRdyChg DevExch } >> ata3.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0 >> res 40/00:20:40:de:90/00:00:07:00:00/40 Emask 0x10 (ATA bus >> error) > > You're getting PHY event on flush which is a pretty strong indication > that you're having power problem. The disk goes out to transfer data in > its buffer to the platter and draws more power from the cable. For some > reason, power is not maintained properly. Disk checks out momentarily > causing the PHY event and losing the data in its buffer. Try to connect > the harddrive to a separate PSU and see whether the problem goes away. Hello, Thank you for the answer. Now, this server is a productive syetem, and runs an important application. The problem generally exists, but looks like comes only when i am testing the transfer with big files. (the application does not do that) About the power: This PC have one 650W Chieftech PS, 1 quad core cpu, and 6 hdd. I have previously measured the power current on the line, and the PC uses only 100-120W on peak. The problem only comes on the 4 raptor hdd, and this drive only uses each 6W. (from the documentation). It is hard to try separate PS or something hw solution. Additionally, generally i think it is not power issue, i am 90% sure. Are you sure this can not be software issue? If you say yes, i will go into the server room, and will try another ps anyway.... more info: The PC have 8GB ram, and memtest runs previously 4 day continously, without error. Thanks, Janos Haar > > -- > tejun > -- > To unsubscribe from this list: send the line "unsubscribe linux-ide" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html