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Date: Sun, 8 Mar 2009 00:11:54 -0600 (CST)
From: Wes Morgan <morganw@chemikals.org>
To: George Hartzell <hartzell@alerce.com>
In-Reply-To: <18867.1464.374096.420552@almost.alerce.com>
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Cc: freebsd-current@freebsd.org
Subject: Re: Am I using atacontrol attach properly? (sata hotplug issue).
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On Sat, 7 Mar 2009, George Hartzell wrote:

> I have a Gigabyte GA-6KIEH-RH motherboard.  It has 5 SATA ports, 4
> attached to a Sil 3114 controller and 1 attach to an ICH8m.  The
> system is running -CURRENT from yesterday.
>
> I have two disks attaching as ad4 and ad6 to ata2 and ata3 resp.
>
> I can set ACHI mode for ICH8m in the BIOS.  When I do not enable it,
> the 5th SATA conector shows up as slave on ata6.  When I do enable it
> the 5th connector shows up as master on ata8.
>
> If I boot without anything connected to the fifth port, then connect a
> drive I thought that the following should work to get the drive
> recognized:
>
>  sudo atacontrol detach ata8
>  sudo atacontrol attach ata8

I'm able to hot-plug new and hot-swap existing drives on an ICH7 
controller, on -current. Have you also tried a reinit?