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Disk drive with multiple actuators on a single axis and disk surfaces of differing track pitch

  • US 6,005,743 A
  • Filed: 05/05/1998
  • Issued: 12/21/1999
  • Est. Priority Date: 02/05/1997
  • Status: Expired due to Fees
First Claim
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1. A data recording disk file comprising:

  • at least one rotatable disk having a data surface on each of two opposite sides thereof, each said data surface having generally concentric data tracks and servo information recorded thereon, at least one of said data surfaces having said data tracks at a farther track pitch, providing a greater separation between said data tracks, than the other of said data surfaces;

    at least two actuators mounted on a common pivot axis, each actuator having at least one head arm assembly with a magnetic head mounted at one end thereof for reading said data tracks and/or writing on said data tracks of a corresponding data surface, one of said actuators associated with said at least one data surface having said data tracks at said farther track pitch; and

    a servo system for separately driving each of said actuators for seek repositioning said magnetic head thereof from one data track to a target data track of said corresponding data surface and for maintaining said magnetic head aligned with a data track.

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