I'm trying to create an Azure VM (specifically a D8s_v3) with an "ultra disk" as the system disk. It's one of the choices in the dropdown for system disk, and my configuration passes the final validation check, but when I press "create" it fails with the error message:
UltraSSD_LRS sku is only supported for empty disks.
An "ultra disk" doesn't appear to be a choice for an added disk.
(This is in the Azure Portal, in case that matters.)
How do you include an "ultra disk" in an Azure VM?