Description of problem:
Cannot add environment disk to instanceType VM, it meet an error:

Error "IOThreads are not supported for disks on a SATA bus" for field "spec.template.spec.domain.devices.disks.domain.devices.disks[2]".

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Add environment disk to a VM created from instanceType
2.
3.

Actual results:
Error happened while adding environment disk

Expected results:
The disk is added

Additional info: