A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 47. The method of controlling the disc drive using a counter-electromotive force includes determining a change in a servo parameter of the disc drive; and controlling the disc drive based on the determined change. The biometric information processing infrastructure selects one or more analyses for processing the input. If the WTRU has an allocated E-DCH resource, the periodic cell update timer is re-started without performing a periodic cell update. The quartz substrate also contains tuning pads to adjust the resonant frequency of the resonator. Specifically, of the ten pins of the OPEN-R connector 500, the DGND and PWRGND ones are formed longer than the other.