Tape drives and methods for reading/writing on first and second surfaces of
a tape include a pair of read/write heads for reading/writing on the
surfaces at the same time in synchronism as the tape moves across the
heads. A controller determines if the heads are reading corresponding
portions of the surfaces of the tape at the same time. The controller also
determines if the heads are moving to corresponding portions of the
surfaces of the tape in the same time period. The controller further
determines if the heads are moving to corresponding tracks on the surfaces
of the tape at the same time.