Re: [Qemu-devel] [PATCH 1/1] Support default interface types per QEMUMachine

[Anthony Liguori]

On 04/26/2012 01:00 PM, Peter Maydell wrote:
> On 26 April 2012 18:58, Igor Mitsyanko<address@hidden>  wrote:
> > Well, performance characteristics of IDE/SCSI do not really matter if there
> > is no IDE/SCSI support
> > in machine model. In case if machine supports various interfaces, the
> > fastest should be set as default,
>
> This would mean our user interface is confusingly different across
> different board models,

Not really.

qemu -hda foo.img

Should mean "create a guest with one drive using whatever disk makes the most 
sense for the given machine."

We need to separate out our UI into two separate categories: one where the user 
only cares about functionality (give me a guest with a disk) verses a user that 
cares about the created hardware (give me a SCSI device).

Regards,

Anthony Liguori

 and also if we have a board that currently
> only supports SD card but later we add support for (say) a SATA
> interface then we have the choice of breaking the "default is
> fastest interface" rule or breaking everybody's old command lines,
> neither of which sound very good.
>
> -- PMM