From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:41090) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RvVPr-0003Ke-BD for qemu-devel@nongnu.org; Thu, 09 Feb 2012 09:56:17 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RvVPg-0001dD-Mj for qemu-devel@nongnu.org; Thu, 09 Feb 2012 09:56:07 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48378) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RvVPg-0001d2-Ej for qemu-devel@nongnu.org; Thu, 09 Feb 2012 09:55:56 -0500 Message-ID: <4F33DF49.6050607@redhat.com> Date: Thu, 09 Feb 2012 15:59:21 +0100 From: Kevin Wolf MIME-Version: 1.0 References: <1327962588-5230-1-git-send-email-agraf@suse.de> <4F33D7F1.9050709@redhat.com> <4A8471A2-00B3-4C2E-8457-7372EBF7FA22@suse.de> In-Reply-To: <4A8471A2-00B3-4C2E-8457-7372EBF7FA22@suse.de> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH] ATA: Allow WIN_SECURITY_FREEZE_LOCK as nop List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Alexander Graf Cc: Jan Kiszka , qemu-devel Developers Am 09.02.2012 15:49, schrieb Alexander Graf: > > On 09.02.2012, at 15:28, Kevin Wolf wrote: > >> Am 30.01.2012 23:29, schrieb Alexander Graf: >>> When using Windows 8 with an AHCI disk drive, it issues a blue screen. >>> The reason is that WIN_SECURITY_FREEZE_LOCK / CFA_WEAR_LEVEL is not >>> supported by our ATA implementation, but Windows expects it to be there. >> >> Is there anything that makes Windows believe that we support it? The >> spec says bits in IDENTIFY word 82 and 128 must be set to indicate >> support for the security feature set, and we don't set those. >> >> Might be just a Windows bug, of course... > > IIUC it's mandatory in more recent ATA versions, so that's probably why it assumes it's there. ACS-2 says it's optional for both ATA and ATAPI devices. Kevin