The controller puts a drive into a blocked state when there is a communication issue. That can be due to feature set differences like supported block size or an inability of the two devices to exchange information in a timely manner or at all. Updating firmware on the controller and drive is a first step in resolving communication issues between the two devices.
Our firmware is designed for use with Dell EMC certified drives. If you are not using our drives then you should check the manufacturer's site for firmware.