Patent ID: 6611393
Filing Date: 2003-08-26
Classification: G11B

Abstract:
A disk drive comprising:(a) a disk comprising a plurality of tracks, each track comprising a plurality of data sectors, the tracks banded together to form a plurality of zones; (b) a head actuated radially over the disk for writing data to and reading data from the data sectors; (c) a buffer for storing zone parameters for each of the plurality of zones; (d) an error list for storing entries identifying read errors; (e) a disk controller for operating in a plurality of states including an active state and an off-line state, wherein: during the active state the disk controller for: receiving a read command from a host computer to read data from at least one of the data sectors; seeking the head to a selected one of the zones comprising the data sector corresponding to the read command; programming the disk drive with the zone parameters corresponding to the selected zone; reading data from the data sector; and detecting a read error associated with reading data from the data sector and storing an entry in the error list corresponding to the selected zone; and during the off-line state, the disk controller for processing the error list to calibrate at least one of the zone parameters.