Patent ID: 6014283
Filing Date: 2000-01-11
Classification: G11B

Abstract:
In a magnetic storage disk drive having a disk with a plurality of concentric data tracks which are spaced apart by a track pitch, a read head having a finite linear response width which is less than one-half the track pitch and a write head being longitudinally spaced apart from the read head within a common structure, a servo burst pattern uniformly repeated from data track to data track for increasing the radial distance within which the read head can be micro-jogged, the servo burst pattern comprising:a first pair of servo bursts that collectively define a first burst pair centerline associated with a particular data track, for centering the read head on the first burst pair centerline to position the write head to write data on the particular data track with the write head being skewed from the read head relative to the first burst pair centerline; anda second pair of servo bursts that collectively define a second burst pair centerline that is located within the finite linear response width of the read head relative to the first burst pair centerline and closer to the first burst pair centerline associated with the particular data track than to a burst pair centerline associated with an adjacent data track to define an asymmetrical micro-jogging region relative to the first burst pair centerline that is bounded by nonlinear regions and extends a first distance from the first burst pair centerline in an inverse data track direction away from the particular data track and the second burst pair centerline and a second greater distance from the first burst pair centerline in a data track direction toward the particular data track and the second burst pair centerline;whereby the read head can be micro-jogged within the asymmetrical micro-jogging region to center the read head on the particular data track while reading data.