Question

You manage a Standard_D2s_v3 virtual machine deployed in an availability set in the East US region. The application team requests that you resize this VM to a Standard_M128s size to support a large in-memory database workload. When you open the VM size blade in the Azure portal, the Standard_M128s size is greyed out and unavailable for selection. The VM is currently running. What is the MOST likely reason and appropriate action to enable this resize?

Accepted Answer

The target size is not available on the current hardware cluster hosting the availability set; stop (deallocate) all VMs in the availability set, then resize.

Answer

Encryption at host must be disabled before any VM can be resized to a memory-optimized size; disable it and retry.

Answer

VMs in availability sets cannot be resized at all; you must delete and recreate the VM in the new size.

Answer

The VM must first be moved to an availability zone before larger sizes become selectable.