From mboxrd@z Thu Jan  1 00:00:00 1970
From: Luben Tuikov <ltuikov@yahoo.com>
Date: Wed, 21 Apr 2010 12:31:46 +0000
Subject: Re: System hangs when using USB 3.0 HD with on Ubuntu
Message-Id: <19701.42333.qm@web31803.mail.mud.yahoo.com>
List-Id: <linux-hotplug.vger.kernel.org>
References: <20100420173734.GB5518@xanatos>
In-Reply-To: <20100420173734.GB5518@xanatos>
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To: Alan Stern <stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org>, Sarah Sharp <sarah.a.sharp-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
Cc: Jonas Schwertfeger <jschwertfeger-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Dinh.Nguyen-KZfg59tc24xl57MIdRCFDg@public.gmane.org, Mark Lord <mlord-e+AXbWqSrlAAvxtiuMwx3w@public.gmane.org>, Sergei Shtylyov <sshtylyov-Igf4POYTYCDQT0dZR+AlfA@public.gmane.org>, James Bottomley <James.Bottomley-l3A5Bk7waGM@public.gmane.org>, Kay Sievers <kay.sievers-tD+1rO4QERM@public.gmane.org>, David Zeuthen <david-o55+BOBDEFg@public.gmane.org>, linux-hotplug-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, USB Storage List <usb-storage-ijkIwGHArpdIPJnuZ7Njw4oP9KaGy4wf@public.gmane.org>, Matthew Dharm <mdharm-usb-JGfshJpz5UybPZpvUQj5UqxOck334EZe@public.gmane.org>, linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Lennart Poettering <lennart-mdGvqq1h2p+GdvJs77BJ7Q@public.gmane.org>, Douglas Gilbert <dgilbert-qazKcTl6WRFWk0Htik3J/w@public.gmane.org>

> > The real problem with the Buffalo drive is that it
> responds with a
> > phase error when it receives an ATA_16 IDENTIFY DEVICE
> command with the
> > Sector Count field set to 0.

The Sector Count field in the ATA PASS-THROUGH (12) or (16) CDB should be set appropriately by the Application Client as the neither the SAT bridge nor the SATA transport will interpret the ATA Command byte. Thus, for IDENTIFY (PACKET) DEVICE the Application Client should set it to 1.

    Luben