> 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
-
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