Patent ID: 6545830
Filing Date: 2003-04-08
Classification: G11B

Abstract:
A disk drive comprising:(a) a disk comprising: a plurality of tracks including a plurality of data tracks and a plurality of reserved tracks; and a plurality of embedded servo sectors dispersed circumferentially around the tracks, wherein: the tracks are banded together to form a plurality of zones; each data track comprises a plurality of data sectors each comprising a first number of bits for storing user data; each reserved track comprises calibration sectors each comprising a second number of bits for storing a calibration test pattern; and the second number of bits is greater than the first number of bits; (b) a head actuated radially over the disk for writing user data to and reading user data from the data sectors, and for reading the calibration test pattern from the calibration sectors; (c) a plurality of zone parameters used to program the disk drive to read user data from a data sector located in a selected one of the plurality of zones; and (d) a disk controller for calibrating the zone parameters by executing a calibration procedure, wherein the calibration procedure reads the calibration test pattern from at least one of the calibration sectors.