Dynamically controlling tape velocity
AssigneeInternational Business Machines Corporation
InventorsNhan X. Bui, Kevin B. Judd, Roger J. Justo, Hirokazu Nakayama, Tomoko Taketomi
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Abstract
A maximum velocity is dynamically determined during a tape drive operation to obtain a statistical standard deviation of a position error signal (PES) that yields an amount of stopwrite (SW) operations that avoids backhitching. The tape velocity is adjusted to the maximum velocity.
Claims21
A method for controlling tape velocity using a processor device, the method comprising:
- dynamically determining a maximum tape velocity during a tape drive operation to obtain a statistical standard deviation of a position error signal (PES) that yields an amount of stopwrite (SW) operations that avoids backhitching;
- and
- adjusting the tape velocity until the statistical standard deviation of the PES is calculated.
A system for controlling tape velocity a tape drive, the system comprising:
- a tape head,
- the tape drive, in communication with the tape head, and
- a processor device, controlling the tape head and the tape drive, wherein the processor device:
- dynamically determines a maximum tape velocity during a tape drive operation to obtain a statistical standard deviation of a position error signal (PES) that yields an amount of stopwrite (SW) operations that avoids backhitching, and
- adjusts the tape velocity until the statistical standard deviation of the PES is calculated.
A computer program product for controlling tape velocity by a processor device, the computer program product comprising a non-transitory computer-readable storage medium having computer-readable program code portions stored therein, the computer-readable program code portions comprising:
- a first executable portion that dynamically determines a maximum tape velocity during a tape drive operation to obtain a statistical standard deviation of a position error signal (PES) that yields an amount of stopwrite (SW) operations that avoids backhitching;
- and
- a second executable portion that adjusts the tape velocity until the statistical standard deviation of the PES is calculated.
Dependencies are inferred from the claim text.