From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41868) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fj0HV-0008Fz-0H for qemu-devel@nongnu.org; Fri, 27 Jul 2018 06:47:35 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fj0HU-0004px-8A for qemu-devel@nongnu.org; Fri, 27 Jul 2018 06:47:33 -0400 References: <3390c4bf-ffac-3744-fd85-84f4ee8193bf@ilande.co.uk> <9c285bce-478f-b786-76e0-f0810336ec23@redhat.com> <16432a45-ad8b-6c09-b50d-ab7101214912@ilande.co.uk> From: Paolo Bonzini Message-ID: Date: Fri, 27 Jul 2018 12:47:18 +0200 MIME-Version: 1.0 In-Reply-To: <16432a45-ad8b-6c09-b50d-ab7101214912@ilande.co.uk> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [Qemu-block] How to generate custom fw paths for IDE devices? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Mark Cave-Ayland , qemu-devel Cc: Kevin Wolf , marcel@redhat.com, Laszlo Ersek , armbru@redhat.com, qemu-block@nongnu.org On 27/07/2018 12:43, Mark Cave-Ayland wrote: > The issue here seems to be that according to "info qtree" there is > *always* an ide-cd device plugged into the location equivalent to that > of -cdrom, and so with the above command QEMU ends up adding a second > ide-cd device to the ide.1 bus which confuses OpenBIOS. Is this > deliberate behaviour? Yes, the default CD-ROM is always placed as secondary/master. If you use -device ide-cd the implicit CD-ROM should go away. However, -drive alone doesn't have that effect (probably for backwards compatibility reasons, this predates me even though by only a few months). Alternatively, you can use -nodefaults of course. Thanks, Paolo