From mboxrd@z Thu Jan 1 00:00:00 1970 From: 7091@blargh.com Subject: Re: sata_sil, writing bug with multiple cards? Date: Tue, 03 Jul 2007 19:05:14 -0700 Message-ID: References: <468A0E24.7020000@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from blargh.com ([24.234.115.147]:49566 "EHLO blargh.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753173AbXGDCFP (ORCPT ); Tue, 3 Jul 2007 22:05:15 -0400 In-Reply-To: <468A0E24.7020000@gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tejun Heo Cc: 7091@blargh.com, linux-ide@vger.kernel.org, jgarzik@pobox.com Tejun Heo writes: > Sounds awfully similar to the recent nvidia data corruption issue. It > was involving the IOMMU and one of the workarounds was not using IOMMU, > IIRC. Please turn off IOMMU and see what happens. You can turn IOMMU > off by passing "iommu=off" as kernel parameter. > > -- > tejun Blast. I stand corrected - it didn't fix it. I now have 3 300G drives hanging off the add-in card, sda sdb sdc. I did the following: # Make a RAID5 array of 3 out of the 4 drives I'll eventually be using mdadm --create /dev/md6 --chunk=64 --level=raid5 --raid-devices=4 /dev/sda1 /dev/sdb1 /dev/sdc1 missing # Make the FS mkfs.ext3 /dev/md6 # Test cp KNOPPIX_V5.1.0CD-2006-12-30-EN.iso kn1.iso cp kn1.iso kn2.iso cp kn2.iso kn3.iso cp kn3.iso kn4.iso # Check md5sum *.iso eea5ecb53f1c6a397bcfeedc2fd42c64 kn1.iso 0360941210aa2d7159999e37c636f8cb kn2.iso md5sum: kn3.iso: Input/output error 86b008915fe02569a513b6c5ec45a523 kn4.iso In the dmesg: [ 2619.483783] attempt to access beyond end of device [ 2619.483956] md6: rw=0, want=25890291976, limit=1758201216 [ 2619.484121] attempt to access beyond end of device [ 2619.484284] md6: rw=0, want=30654872552, limit=1758201216 [ 2619.484452] attempt to access beyond end of device [ 2619.484614] md6: rw=0, want=33748316016, limit=1758201216 [ 2619.484780] attempt to access beyond end of device [ 2619.484943] md6: rw=0, want=7818926368, limit=1758201216 [ 2619.485122] attempt to access beyond end of device [ 2619.485285] md6: rw=0, want=32912340352, limit=1758201216 [ 2619.485451] attempt to access beyond end of device [ 2619.496228] md6: rw=0, want=2277136440, limit=1758201216 [ 2619.496394] attempt to access beyond end of device [ 2619.496557] md6: rw=0, want=2128357688, limit=1758201216 [ 2619.529625] attempt to access beyond end of device [ 2619.530392] md6: rw=0, want=25890291976, limit=1758201216