Re: [Qemu-devel] qemu-iotests 042: zero size image on VMDK

[Stefan Hajnoczi]

On Thu, Apr 18, 2013 at 03:08:55PM +0800, Fam Zheng wrote:
> Currently VMDK block driver fails qemu-iotest case 042 because it
> refuses to create block with zero size (silently). Is support for zero
> size image desired or should this case be skipped?
> 
>     $ qemu-img create -f vmdk t.vmdk 0
>     Formatting 't.vmdk', fmt=vmdk size=0 compat6=off 
>     qemu-img: t.vmdk: error while creating vmdk: No such file or directory

Is there a reason to refuse 0-sized images?  The VMware tools can resize
images so it would be possible to grow them later (i.e. the use case is
weird but might still be valid).

It's also worth checking if VMware tools allow you to create 0-sized
image and whether they can operate on them.  If they fail to open or
inspect 0-sized images, then QEMU should not create them.

Stefan