From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Miguel Medalha" Subject: Disk errors reported on boot - kernel 2.6.18 Date: Thu, 14 Jun 2007 07:44:42 +0100 Message-ID: <001201c7ae4f$7d829df0$0901a8c0@medalha> Mime-Version: 1.0 Content-Type: text/plain; format=flowed; charset="Windows-1252"; reply-type=original Content-Transfer-Encoding: 7bit Return-path: Received: from relay4.ptmail.sapo.pt ([212.55.154.24]:48971 "HELO sapo.pt" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with SMTP id S1752066AbXFNGve (ORCPT ); Thu, 14 Jun 2007 02:51:34 -0400 Received: from unknown (HELO medalha) (miguelmedalha@sapo.pt@[82.155.56.159]) (envelope-sender ) by mta14 (qmail-ldap-1.03) with SMTP for ; 14 Jun 2007 06:44:53 -0000 Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org Gentlemen I thought you might be interested in the following: I just installed CentOS 5 on a computer (kernel-2.6.18-8.1.4.el5.i686) . On boot, I get an error message, related to 2 SATA disks. These errors did NOT appear on version 4.4 (kernel-smp-2.6.9-42.EL.i586) with the EXACT same hardware. Despite the error messages, the disks seem to be working with no problems. I searched the Net for these errors and they seem to appear with a wide range of disks, controlers and chip set brands, even with different Linux distributions. The issue seems to be related to the last few kernel versions and is perhaps a bug or ill implemented "feature" of libata or ata_piix. My configuration: - 2 Hitachi HDS722512VLSA80 SATA 120 GB Harddisks (first generation, no NCQ) - Intel P4 3GHz - Tyan Tomcat i875p (S5102) motherboard, Intel ICH5 disk controler - 1 GB ECC RAM - 2 Intel Gb NICs - 1 Intel 10/100 NIC Error message follows: --------------------------------------------------------------------- ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0 ata1.00: tag 0 cmd 0xb0 Emask 0x1 stat 0x51 err 0x4 (device error) ata1: EH complete --------------------------------------------------------------------- This repeats another 5 times, after which come the statements: --------------------------------------------------------------------- SCSI device sda: 241254720 512-byte hdwr sectors (123522 MB) sda: Write Protect is off sda: Mode Sense: 00 3a 00 00 SCSI device sda: drive cache: write back SCSI device sda: 241254720 512-byte hdwr sectors (123522 MB) sda: Write Protect is off sda: Mode Sense: 00 3a 00 00 SCSI device sda: drive cache: write back (Is this duplication normal?) --------------------------------------------------------------------- The whole thing is repeated for "ata2.00" and "SCSI device sdb" I connected both disks to a Promise PDC20378 Sata Controler available on the same board and the error disappears. The configuration stays EXACTLY the same, I only switch both disks' SATA cables to the other 2 connectors. So, it is related to the use of the Intel 82801EB ICH5 controler that makes the Southbridge. Thank you Miguel Medalha