Patent ID: 7872825

Claim:
A data storage drive comprising: a storage disk partitioned into a plurality of zones; a read/write head, the read/write head operative to read data from and write data to the storage disk at a plurality of data transfer rates; an oscillator circuit adapted to operate at one of a plurality of reference frequencies when the data storage drive is in operation; and signal processing circuitry in signal communication with the read/write head, the signal processing circuitry at least partially powered by a variable voltage source which dynamically varies a supply voltage to the signal processing circuitry as a function of a current one of the data transfer rates of the read/write head and a current one of the reference frequencies of the oscillator circuit; wherein the supply voltage to the signal processing circuitry is at least partially determined as a function of respective values obtained by addressing at least first and second lookup tables; wherein the first lookup table relates the supply voltage for the signal processing circuitry to respective ones of the plurality of zones; and wherein the second lookup table relates the supply voltage for the signal processing circuitry to respective ones of the plurality of reference frequencies of the oscillator circuit.