Please add "WDC WD3200BEVT-22ZCT0" to the NCQ blacklist.
I had some performance problem and I added this line:
{ "WDC WD3200BEVT-22ZCT0", NULL, ATA_HORKAGE_NONCQ },
around line 4184 of drivers/ata/libata-core.c (linux 2.6.30),
and now it work quite well...
Also "WDC WD5000AACS-00ZUB0" may have this problem, but I can't be sure...
You can see here: "https://bugs.launchpad.net/ubuntu/+source/linux/+bug/343371";
bye,
Andrea
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