This read-create object identifies the type of VSI controller configured in a given row, and it cannot be changed once the row's status is active. An administrator sets this when provisioning a new VSI controller entry to specify what kind of controller it represents, and must deactivate the row first if the type needs to change later. For example, attempting to alter cvcConfControllerType on an already-active controller entry would be rejected, requiring the admin to remove and recreate the entry instead.