From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Tokarev Subject: Re: qemu-kvm: Inconsistent vgabios reference Date: Sun, 15 Jan 2012 17:27:39 +0400 Message-ID: <4F12D44B.2040208@msgid.tls.msk.ru> References: <4F12B500.90705@web.de> <4F12C79E.8060902@redhat.com> <4F12C907.3070702@web.de> <4F12C9BF.7040406@redhat.com> <4F12CA17.9010604@web.de> <4F12CB51.4040502@redhat.com> <4F12CB9C.9010006@web.de> <4F12CC59.8090808@redhat.com> <4F12D056.2060605@msgid.tls.msk.ru> <4F12D226.803@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Jan Kiszka , Marcelo Tosatti , kvm To: Avi Kivity Return-path: Received: from isrv.corpit.ru ([86.62.121.231]:37745 "EHLO isrv.corpit.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752462Ab2AON1m (ORCPT ); Sun, 15 Jan 2012 08:27:42 -0500 In-Reply-To: <4F12D226.803@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On 15.01.2012 17:18, Avi Kivity wrote: > On 01/15/2012 03:10 PM, Michael Tokarev wrote: [] >> FWIW, I had to patch extboot back in for debian qemu-kvm 1.0, because >> of lack of boot support from scsi (and no alternative), and because >> many people's scripts who used boot= broke. I thought it is better >> to let users to have a chance to perform a smoother transition than >> to break their stuff. > > It's really sad that people have to use lsi scsi. Luckily qemu 1.1 will > feature virtio-scsi, though of course that doesn't help already > installed guests or non Windows/Linux guests. Do you know what the use > cases requiring scsi boot are? I've one (not very pleasant) bugreport handy, http://bugs.debian.org/652447 and a few private messages asking me for ways to restore booting from scsi, all talking about older/custom systems which worked for years in kvm. As you can see in the bugreport mentioned, I know that scsi is broken and should not be used and so on, and suggested switching from it on every chance. >> Now, I've a question: what seabios implementation of extboot we're >> talking about? -option-rom which is impossible to select as a first >> boot device? > > seabios has native support for booting from virtio-blk, and will > natively support virtio-scsi as well. Ah. Well, I thought especially about lsi emulated scsi. I wasn't able to boot from it even with their bios -- once there's at least one other bootable device present (including the NIC) it refuses to boot from lsi emulated scsi drive. Thanks, /mjt