From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeff Garzik <jeff@garzik.org>
Subject: Re: No NCQ support on X61s Ultrabay?  (Intel ICH8 SATA controller
 question)
Date: Wed, 29 Apr 2009 22:27:46 -0400
Message-ID: <49F90CA2.4080602@garzik.org>
References: <E1LzLgA-0004j6-9W@closure.thunk.org>
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To: Theodore Ts'o <tytso@mit.edu>
Cc: linux-kernel@vger.kernel.org, Matthew Wilcox <willy@linux.intel.com>, Linux IDE mailing list <linux-ide@vger.kernel.org>

Theodore Ts'o wrote:

(you should cc linux-ide...)

> [ 4563.614247] ata4.00: 390721968 sectors, multi 16: LBA48 NCQ (depth 0/32)
>                                                                 ^^^^^^^

That generally means your disk is capable of NCQ, but your controller is 
not.

As Tejun noted, try switching to AHCI mode in BIOS.

	Jeff