Data recording apparatus for fast detection of servo sectors and correction of track address using a divided gray code and a parity bit

Abstract

A servo sector forming method for fast detection and corresponding track address correcting method. The track address correcting method for a disk driving/recording apparatus uses as a recording medium a disk comprised of a plurality of track groups. A plurality of tracks are incorporated in each group, each having a data sector and a servo sector with a gray code field separated into a higH.sub.-- gray code field and a low-gray code field, a gap field for supplying the synchronization point of time and a parity bit field in which a group change information is recorded. The gray code read from the higH.sub.-- gray code field and low-gray code field is decoded during a track detection to detect a read address. A correction value for correcting a track address according to the track detection direction is added to the read address to detect the track address. Therefore, track detection time can be maintained in a high-capacity hard disk drive, irrespective of extension of a gray code field.

Dependencies are inferred from the claim text.