This CucsStorageActualWriteType value reports the write-cache policy actually in effect on a virtual drive, which may differ from the administrator-configured policy if a battery or cache condition forces a fallback. An admin compares this actual policy to the configured one to detect when the controller has silently downgraded caching, for example due to a failed cache battery. For example, if this actual policy shows write-through while the configured policy specifies write-back, the admin investigates the controller's cache battery health.