Data storage device having a drive mechanism for rotating a data storage medium

A rotary drive for rotating a data carrier, magnetic hard disk data storage device comprising:

• a clean chamber;
• a brushless direct current motor with a permanent magnet rotor;
• and a wound stator having at least one winding coil for conducting current pulses to generate a magnetic field for producing rotary movement of the rotor;
• a hub rigidly connected to and rotatably driven by said rotor;
• at least one magnetic hard data storage disk located in said clean chamber and affixed to said hub for magnetically storing data signals;
• a circuit arrangement for activating the coil to generate a magnetic field for producing rotary movement in the rotor;
• magnetic sensing means located in said clean chamber for reading data signals recorded on the data carrier hard data storage disk, the output of the sensing means being connected to the circuit arrangement for activating the winding, and the data carrier having the data signals including control data signals which identify at least those angular positions of the rotor relative to the stator at which commutation of current fed to conducted by the winding coil is to be initiated, said control data signals remaining in permanently fixed angular locations on said magnetic hard data storage disk relative to said rotor;
• and
• a circuit operating to feed current pulses to said winding coil to rotate said rotor, said circuit being connected to the output of said magnetic sensing means to produce and separate the current pulses in response to said control data signals read from said magnetic hard data storage disk.