Vibration control in data storage devices

A method of operating data storage device having a device body, a read/write head configured to read and write data in a data track of a storage medium carried by the device body in use, an actuator system mounted on the device body configured to effect movement of the read/write head relative to the data track to align the head with the data track, the actuator system having a plurality of degrees of freedom for effecting the movement, a controller configured to control the actuator system to effect the movement, a body vibration sensor, provided on the device body, configured to generate a signal indicative of vibration of the body, and an actuator vibration sensor, provided on the actuator system, configured to generate a signal indicative of vibration of the actuator system, the method comprising:

• processing, by the controller, the signals from the body and actuator vibration sensors to derive a coupling signal indicative of vibration coupling between the degrees of freedom;
• and
• controlling the actuator system dependent on the one coupling signal and the signal from the body vibration sensor.