Patent ID: 6396654
Filing Date: 2002-05-28
Classification: G11B

Abstract:
A method of writing servo information, including head position identifying information, on a surface of a plurality of disks in a hard disk drive (HDD), comprising the steps of:(a) positioning each of a plurality of heads over an outermost circumferential track disposed on the surface of a corresponding disk of the plurality of disks in such a manner that an actuator contacts an outer crash stop based on a control command for writing servo information; (b) causing each of said plurality of said heads to write corresponding head position identifying information on a first half track area of said outermost circumferential track based on said control command for writing servo information; (c) moving each of said plurality of heads inwardly by {fraction (1/2+L )} track across said corresponding disk so that each of said plurality of heads is positioned over a second half track area of said outermost circumferential track by using said corresponding head position identifying information written on said first half track area of said outermost circumferential track as a position control value; (d) causing each of said plurality of heads to write corresponding head position identifying information on said second half track area of said outermost circumferential track; (e) sequentially moving each of said plurality of heads inwardly by {fraction (1/2+L )} track across said corresponding disk toward a next track in the same manner as in said step (c) using said corresponding head position identifying information written on said second half track area of said outermost circumferential tract as said position control value; and (f) causing each of said plurality of heads to write a plurality of head position identifying information on said corresponding disk in the same manner as in said step (d), thereby writing the servo information, including the head position identifying information, on all of the tracks of said surface of said corresponding disks; wherein step (b) comprises writing burst signals on a surface of a first disk through a first head, and writing said burst signals on a surface of each remaining one of said plurality of disks sequentially through second, third and fourth heads by delaying by one-quarter sector time for said each remaining one of said plurality of disks.