Patent ID: 8310902
Filing Date: 2012-11-13
Classification: G11B

Abstract:
1. A disk drive comprising: a slider containing a read head, a write head and a laser; a disk with thin film magnetic material that includes a plurality of angularly spaced servo sectors with servo information readable by the read head as the disk rotates and the servo sectors periodically pass under the read head; a read-write IC that is connected through a flexible cable to a write data line as input, the read-write IC supplying a pulsing drive signal to the laser to heat magnetic material on the disk and supplying write signals to the write head, the read-write IC including a pulse extraction circuit that uses training signals on the write data line to derive a timing of the pulsing drive signal for the laser; and system electronic circuits that periodically place the training signals on the write data line as input to read-write IC through the flexible cable when receiving servo information from the read head.