From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33315) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZC5in-00016E-7R for qemu-devel@nongnu.org; Mon, 06 Jul 2015 08:42:06 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZC5im-0001O6-0G for qemu-devel@nongnu.org; Mon, 06 Jul 2015 08:42:05 -0400 Message-ID: <559A7793.1050307@redhat.com> Date: Mon, 06 Jul 2015 08:41:55 -0400 From: John Snow MIME-Version: 1.0 References: <1435713640-12362-1-git-send-email-jsnow@redhat.com> <1435713640-12362-11-git-send-email-jsnow@redhat.com> <20150705145316.GA4029@morn.localdomain> In-Reply-To: <20150705145316.GA4029@morn.localdomain> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Subject: Re: [Qemu-devel] [RFC 10/10] fdc: change default drive to 288 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Kevin O'Connor Cc: kwolf@redhat.com, armbru@redhat.com, qemu-block@nongnu.org, qemu-devel@nongnu.org On 07/05/2015 10:53 AM, Kevin O'Connor wrote: > On Tue, Jun 30, 2015 at 09:20:40PM -0400, John Snow wrote: >> The 2.88 drive is more suitable as a default because >> it can still read 1.44 images correctly, but the reverse >> is not true. >> >> Since there exist virtio-win drivers that are shipped on >> 2.88 floppy images, this patch will allow VMs booted without >> a floppy disk inserted to later insert a 2.88MB floppy and >> have that work. >=20 > On real machines, 1.44MB floppy drives were very common. It was > exceptionally rare to see 2.88MB floppy drives though. There is a > risk that changing the default to an exotic piece of hardware will > expose quirks in guest Operating Systems. >=20 > -Kevin >=20 Definitely. Which is why I do want to add some properties to allow users to help guide the type of floppy drive they get. 2.88MB might well be a saner default for when no diskette is inserted (It allows for, I believe, the widest choice of likely types to be inserted later.) Windows (MSDOS through Windows8) and Linux both seem completely fine, which I think represents the lion's share of likely guests. For other guests, you can always tweak the CLI to provide a drive type the guest can use.