Parallel Servo-Track Write and Read Verification With Side-By-Side Inductive Head Elements
Original Publication Date: 1984-Jan-01
Included in the Prior Art Database: 2005-Feb-02
Current servo-track writing schemes usually require some sort of a verification process to insure the integrity of the resulting position error signal (PES). This verification can be performed directly over the servo track by looking at the readback quality of each written bit, or it can be performed by positioning between tracks and looking at the quality of the resulting PES. Current product servowriters use one of these two schemes with a single-element inductive head as both the write and read transducer and, therefore, must perform these operations in serial. While inline dual element heads have been proposed, these do not lend themselves easily to thin film fabrication techniques, and are not applicable when trying to read verify between servo-tracks on the composite PES.