A method, apparatus and program storage device for providing virtual disk service hints based storage. The first electrode comprises two combs symmetrical to a first mirror plane. The repeatable run-out estimator compensates for a constant bias torque disturbance in the drive. The semiconductor wafer structure comprises a slip core formed of a semiconductor material, a first annular portion, and a second annular portion. Application particularly for solar cells in thin layer. The device outputs or stores the test result, and receives, based on the test result, a request for a diagnostic analysis of the code.