From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert Hancock Subject: Re: SB600 in AHCI mode will not run SATA optical drive Date: Mon, 05 Jan 2009 19:03:14 -0600 Message-ID: <4962ADD2.3010007@shaw.ca> References: <21155.72.218.132.189.1231111986.squirrel@webmail.tuffmail.net> <4961A39C.30405@shaw.ca> <19325.72.218.132.189.1231202477.squirrel@webmail.tuffmail.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from idcmail-mo1so.shaw.ca ([24.71.223.10]:59649 "EHLO idcmail-mo1so.shaw.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750812AbZAFBDQ (ORCPT ); Mon, 5 Jan 2009 20:03:16 -0500 In-Reply-To: <19325.72.218.132.189.1231202477.squirrel@webmail.tuffmail.net> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Darrick Burch Cc: linux-ide@vger.kernel.org Darrick Burch wrote: > Robert Hancock wrote: > >> Could be some kind of SATA PHY quirk or incompatibility that only shows >> up in AHCI mode or something. It seems from the output that the SATA >> link may be going up and down. You could try forcing 1.5Gbps >> (libata.force=1.5Gbps if libata is built in, or force=1.5Gbps when the >> libata module gets loaded) and see if that helps. > > That appears to have done it--thanks! I feel kinda bad now because I was > suspecting a speed issue, but couldn't figure out how to force it. If I > had read the kernel documentation a little more, I would have found the > kernel option you mentioned. Duh. At any rate, thanks again. Could be we need a quirk in libata for that drive to do that automatically, or something.. Can you post the dmesg output from bootup with the force 1.5Gbps option in place?