Re: [Qemu-devel] [PATCH 1/5] RFC: Efficient VM backup for qemu (v1)

[Dietmar Maurer]

> It's a naughty thing to do but we could simply pick a new constant and
> support LZO as an incompatible option.  The file is then no longer compatible
> with existing vmdk tools but at least we then have a choice of using
> compatible deflate or the LZO extension.

To be 100% incompatible to existing tools? That would remove any advantage.
 
> VMDK already has 99% of what you need and we already have a bunch of
> code to handle this format.  This seems like a good opportunity to flesh out
> VMDK support and avoid reinventing the wheel.

Using 'probably' patented software is a bad idea - I will not go that way.