Re: [Qemu-devel] [PATCH v4 12/12] fdc: change auto fallback drive for ISA FDC to 288

[Eric Blake]

On 01/19/2016 11:51 PM, 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.
> 
> This patch has been tested with msdos, freedos, fedora,
> windows 8 and windows 10 without issue: if problems do
> arise for certain guests being unable to cope with 2.88MB
> drives as the default, they are in the minority and can use
> type=144 as needed (or insert a proper boot medium and omit
> type=144/288 or use type=auto) to obtain different drive types.
> 
> As icing, the default will remain auto/144 for any pre-2.6
> machine types, hopefully minimizing the impact of this change
> in legacy hw to basically zero.
> 
> Signed-off-by: John Snow <address@hidden>
> ---
>  hw/block/fdc.c      | 2 +-
>  include/hw/compat.h | 4 ++++
>  2 files changed, 5 insertions(+), 1 deletion(-)
> 

Reviewed-by: Eric Blake <address@hidden>

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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