Multi-channel magnetic tape system having optical tracking servo
First Claim
1. A tape drive system for use with a tape having a magnetic side and an optical side with optical servo tracks formed thereon, the tape drive system comprising:
- a movable optical head which detects information relating to the optical servo tracks;
a movable magnetic head which reads and writes data on the magnetic side of the tape;
an assembly which couples movement of the magnetic head to movement of the optical head;
a motor which controls movement of the assembly;
an optical servo control system which controls movement of the assembly based on the information relating to the optical servo tracks detected by the optical head, wherein the optical servo control system includes a fine position servo loop, the fine position servo loop outputting a signal to control the motor based on the information relating to the optical servo tracks; and
a pivoting beam structure coupled between the motor and the assembly, the motor applying a torque force to the pivoting beam structure that causes movement of the assembly.
14 Assignments
0 Petitions
Accused Products
Abstract
A magnetic storage medium formed on a front major surface of a tape substrate defines a multiplicity of longitudinal data recording and playback tracks, each track having a nominal lateral location relative to the other tracks: and a predetermined optically manifested track servo pattern defined on the back major surface of the tape for indicating lateral displacement of the tape from a nominal lateral location of the track during tape movement across a read/write head. A magnetic tape recording and playback system employing the magnetic storage medium is also disclosed.
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Citations
15 Claims
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1. A tape drive system for use with a tape having a magnetic side and an optical side with optical servo tracks formed thereon, the tape drive system comprising:
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a movable optical head which detects information relating to the optical servo tracks; a movable magnetic head which reads and writes data on the magnetic side of the tape; an assembly which couples movement of the magnetic head to movement of the optical head; a motor which controls movement of the assembly; an optical servo control system which controls movement of the assembly based on the information relating to the optical servo tracks detected by the optical head, wherein the optical servo control system includes a fine position servo loop, the fine position servo loop outputting a signal to control the motor based on the information relating to the optical servo tracks; and a pivoting beam structure coupled between the motor and the assembly, the motor applying a torque force to the pivoting beam structure that causes movement of the assembly.
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2. A tape drive system for use with a tape having a magnetic side and an optical side with optical servo tracks formed thereon, the tape drive system comprising:
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a movable optical head which detects information relating to the optical servo tracks; a movable magnetic head which reads and writes data on the magnetic side of the tape; an assembly which couples movement of the magnetic head to movement of the optical head; and an optical servo control system which controls movement of the assembly based on the information relating to the optical servo tracks detected by the optical head, wherein the optical servo control system comprises a coarse head position control system and a fine position servo control loop, the coarse head position control system causing the assembly to move in preset increments and the fine position servo control loop causing the optical head to follow an optical track formed on the tape. - View Dependent Claims (3)
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4. A method, for use in a tape drive system comprised of a tape having a magnetic side and an optical side with optical servo tracks formed thereon, an optical head, a magnetic head, an assembly which couples movement of the magnetic head to movement of the optical head, and an optical servo control system, the method comprising:
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detecting information relating to the optical servo tracks using the optical head; controlling movement of the assembly, using the optical servo control system, based on the information relating to the optical servo tracks detected by the optical head and using a motor, wherein the optical servo control system comprises a fine position servo loop, the fine position servo loop outputting a signal to control the motor based on the information relating to the optical servo tracks; and applying a torque force, using the motor, to a pivoting beam structure coupled between the motor and the assembly, the torque force causing movement of the assembly.
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5. A method, for use in a tape drive system comprised of a tape having a magnetic side and an optical side with optical servo tracks formed thereon, an optical head, a magnetic head, an assembly which couples movement of the magnetic head to movement of the optical head, and an optical servo control system, the method comprising:
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detecting information relating to the optical servo tracks using the optical head; and controlling movement of the assembly, using the optical servo control system, based on the information relating to the optical servo tracks detected by the optical head, wherein the optical servo control system comprises a coarse head position control system and a fine position servo control loop, the coarse head position control system causing the assembly to move in preset increments and the fine position servo control loop causing the optical head to follow an optical track formed on the tape. - View Dependent Claims (6, 7)
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8. A tape drive system for use with a tape having a magnetic side and an optical side with optical servo tracks formed thereon, the tape drive system comprising:
- means for detecting information relating to the optical servo tracks;
means for reading and writing data on the magnetic side of the tape; and
means for coupling movement of the magnetic head to movement of the optical head during reading and writing. - View Dependent Claims (9, 10, 11, 12)
- means for detecting information relating to the optical servo tracks;
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13. A system comprising:
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a tape having a magnetic side and an optical side having optical servo tracks; a magneto-optic head system having a magnetic head and an optical head, the magneto-optic head system physically coupling the magnetic head to the optical head, wherein the magneto-optic head system comprises a first arm for holding the magnetic head and a second arm for holding the optical head, the first and second arms being connected physically; an optical servo control system that aligns the magneto-optic head system to the tape, wherein the optical servo control system comprises a fine position servo loop, the fine position servo loop outputting a signal based on the information relating to the optical servo tracks to control the motor; and a pivoting beam structure coupled between the motor and the magneto-optic head system, the motor applying a torque force to the pivoting beam structure that causes movement of the magneto-optic head system.
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14. A system comprising:
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a tape having a magnetic side and an optical side having optical servo tracks; a magneto-optic head system having a magnetic head and an optical head, the magneto-optic head system physically coupling the magnetic head to the optical head; and an optical servo control system that aligns the magneto-optic head system to the tape, wherein the optical servo control system comprises a coarse head position control system and a fine position servo control loop, the coarse head position control system causing the magneto-optic head system to move in preset increments and the fine position servo control loop causing the optical bead to follow an optical servo track formed on the tape. - View Dependent Claims (15)
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Specification