FT Virtual Machines not Placed or Evacuated by vSphere DRS

FT virtual machines in a cluster that is activated with vSphere DRS do not function correctly if Enhanced vMotion Compatibility (EVC) is currently deactivated.

Problem

Because EVC is a prerequisite for using DRS with FT VMs, DRS does not place or evacuate them if EVC has been deactivated (even if it is later reactivated).

Cause

When EVC is deactivated on a DRS cluster, a VM override that deactivates DRS on an FT VM might be added. Even if EVC is later reactivated, this override is not canceled.

Solution

If DRS does not place or evacuate FT VMs in the cluster, check the VMs for a VM override that is deactivating DRS. If you find one, remove the override that is deactivating DRS.

Note: For more information on how to edit or delete VM overrides, see vSphere Resource Management.