Patent ID: 6081399
Filing Date: 2000-06-27
Classification: G11B

Abstract:
A disk drive, comprising:a disk having a plurality of tracks formed concentrically along a first surface of said disk for storing data, said plurality of tracks being divided into first and second data storage regions positioned between an innermost circumferential region and an outermost circumferential region of said disk;first and second heads for writing and reading the data to and from said first surface of said disk, said first head being positioned to access said first data storage region while said second head is positioned to access said second data storage region, and said first head being positioned to access said second data storage region while said second head is positioned to access said first data storage region;first and second arm assemblies respectively connected to said first and second heads, said first arm assembly extending said first head over a first radius of said disk, and said second arm assembly extending said second head over a second radius of said disk;an actuator for shifting said first and second heads among said plurality of tracks by driving said first and second arm assemblies;means for selecting one of said first and second heads by a predetermined control; anda control unit for providing said predetermined control to enable selection of the one of said first and second heads that is closer to a target position on said first surface of said disk so that the one of said first and second heads that is closer to said target track can access the data at said target track.