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Date:      Mon, 12 May 2008 09:27:13 +0400
From:      "Andrey V. Elsukov" <bu7cher@yandex.ru>
To:        Jeremy Chadwick <koitsu@freebsd.org>
Cc:        stable@freebsd.org, jonathan@kc8onw.net, sos@FreeBSD.org
Subject:   Re: ATA APM and NCQ support in FreeBSD atacontrol
Message-ID:  <4827D531.7000603@yandex.ru>
In-Reply-To: <20080512030647.GA93725@eos.sc1.parodius.com>
References:  <29626.214.13.212.30.1210554531.squirrel@www.kc8onw.net> <20080512030647.GA93725@eos.sc1.parodius.com>

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Jeremy Chadwick wrote:
> I believe NCQ is supported, assuming that your controller is operating
> in AHCI mode and your disk supports NCQ.  This mainly applies to Intel
> ICHx controllers, but there are others which support it as well.
> There's also NCQ support in non-AHCI drivers like hptmv(4), rr232x(4),
> hptrr(4), and mpt(4) with SATA disks.

No. ata(4) driver currently doesn't support/use NCQ.

-- 
WBR, Andrey V. Elsukov



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