Comment 1 for bug 737668

Thanks for reporting this bug and helping to make Ubuntu better.

I'm marking this confirmed based on
http://xen.1045712.n5.nabble.com/Re-ioctl-00005382-not-supported-by-Xen-blkdev-td2563654.html

The added check seems like a good idea. Would you be willing to contact the upstream vmware developers to see if they are willing to add it?