Recently, I have a problem that after restarting the recorder the disk cannot start. You hear it spinning and stopping every now and then. The system cannot detect it. It only helps to turn off the power supply plug from the recorder, turning off the switch on the back of the housing does not change anything. Recorder DS-7604NI-K1 / 4P, HDD 2 TB WD20PURZ. What can be the reason for this disk behavior?