SKEW ACTUATOR TO SERVO TRACK ZERO REFERENCE

摘要

A servo detection system for detecting servo tracks of a longitudinal tape (11). In a read/write head, two servo read heads (50, 51) are spaced laterally on a first head module (35), and a servo read head (52, 53) is on a second head module (36) spaced longitudinally from the first module (35). A method comprises initially sensing a tape servo track (110 - 114) with one servo read head of the first module (35) and the servo read head of the second module (36) to determine skew misalignment of the servo track. A zero reference value is stored representing the determined skew misalignment. The detection system switches from the one servo read head of each module, to the two servo read heads of the first module, and employs the stored value to position the read/write head in the zero skew position. The two servo read heads are then employed to read two servo tracks to identify the data band and to control skew.