From owner-freebsd-hackers@FreeBSD.ORG  Sun Dec  9 04:21:36 2012
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From: Eitan Adler <lists@eitanadler.com>
Date: Sat, 8 Dec 2012 23:21:04 -0500
Message-ID: <CAF6rxgkYAhF--C96XBb7JXGYdr2rK0F_AA_fx=d+9kKpTr=CXw@mail.gmail.com>
Subject: Re: FreeBSD for serious performance? (was: Re: 9.x -- New Install --
 serious partition misalignment)
To: Adrian Chadd <adrian@freebsd.org>
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Cc: freebsd-hackers@freebsd.org, "Ronald F. Guilmette" <rfg@tristatelogic.com>
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On 8 December 2012 23:19, Adrian Chadd <adrian@freebsd.org> wrote:
> Hi,
>
> Yes. atacam supports NCQ.
>
> The older IDE/ATA code doesn't support NCQ. The CAM ATA code (ie,
> atacam) supports it if the drive supports it.
>
> So, the "FreeBSD doesn't do NCQ" point is incorrect.
>
> If you don't believe me - look in sys/cam/ata/ata_da.c, look for ata_ncq_cmd().

Thanks for the correction - my memory was wrong.
-- 
Eitan Adler