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Message-ID: <87zlyksyfc.fsf@meer.net> Date: Sun, 14 Oct 2007 23:07:51 -0700 From: Don Mullis <dwm@...r.net> To: Luca Tettamanti <kronos.it@...il.com> Cc: linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org Subject: Re: Hitachi disk: spurious completions during NCQ > ata3.00: spurious completions during NCQ issue=0x0 SAct=0x407fd FIS=005040a1:00020000 > ata3.00: cmd 61/08:00:c7:5a:82/00:00:1b:00:00/40 tag 0 cdb 0x0 data 4096 out > res 50/00:10:07:5b:82/00:00:1b:00:00/40 Emask 0x2 (HSM violation) This has been seen with several Hitachi drives. There's speculation that it's due to a bug in the drive firmware: http://groups.google.it/group/linux.kernel/browse_thread/thread/a4bd3c19565a2009/389817602f0cd551?hl=it&lnk=st&q=hitachi+hsm+violation&rnum=3#389817602f0cd551 https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.22/+bug/137470 A workaround: Index: /etc/rc.local =================================================================== --- .orig/etc/rc.local 2007-10-13 14:57:10.000000000 -0700 +++ /etc/rc.local 2007-10-13 14:59:21.000000000 -0700 @@ -11,4 +11,7 @@ # # By default this script does nothing. +# See https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.22/+bug/137470/ +echo 1 > /sys/block/sda/device/queue_depth + exit 0 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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