Patent ID: 6341045
Filing Date: 2002-01-22
Classification: G11B

Abstract:
A large-capacity flexible disk comprising:a disk-shaped magnetic disk medium on which a plurality of tracks are arranged with concentric circles, each track being divided in a circumferential direction into a predetermined number of sectors having a length equal to one another, and each sector comprising a servo field and a data field; wherein each servo field comprises a number field indicating a position of the sector in which it is provided, and a sector timing mark field preceding the number field and notifying the number field; wherein the number field includes a space for storing alteration contents of said disk-shaped magnetic disk medium; and wherein the servo field further comprises, in front of the number field, a preamble field and, behind the number field, a zero field for a phase matching, a plurality of burst fields for detecting position deviation, and a pad field for another phase matching.