Using component position error signals (PES) to measure tape distortion
AssigneeStorage Technology Corporation
InventorLinus Tsung-Shu Wang
Life of this patent
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Abstract
A method, system and program for measuring magnetic tape track distortion are provided. The invention comprises defining specifications for tape track distortion acceptability and using tape head servo readers to collect component position error signal (PES) data from servo tracks on a magnetic tape. The separate PES data are analyzed to determine tape distortion. The data can also be adjusted for reliability factors that might affect the confidence of the PES data. The distortion data for the tape is then compared to the defined specifications and a determination is made as to whether the tape meets acceptability standards.
Claims21
A method for measuring magnetic tape track distortion for a tape, comprising:
- collecting position error signal (PES) data from servo tracks on a magnetic tape using tape head servo readers;
- analyzing the PES data to determine tape distortion;
- comparing the tape distortion to specifications for tape track distortion acceptability;
- and
- determining if the tape meets specifications.
An system for measuring magnetic tape track distortion for a tape, comprising:
- a control unit connected to tape head servo readers, wherein the control unit collects position error signal (PES) data from servo tracks on a magnetic tape using the tape head servo readers;
- a data processor connected to the control unit, wherein the data processor analyzes the PES data to determine tape distortion;
- a comparator unit connected to the data processor, wherein the comparator unit compares the tape distortion to specifications for tape track distortion acceptability and determines if the tape meets specifications.
A computer program product in a computer readable medium for use in a data processing system, for measuring magnetic tape track distortion, the computer program product comprising:
- instructions for collecting position error signal (PES) data from servo tracks on a magnetic tape using tape head servo readers;
- instructions for analyzing the PES data to determine tape distortion;
- instructions for comparing the tape distortion to specifications for tape track distortion acceptability;
- and
- instructions for determining if the tape meets specifications.
Dependencies are inferred from the claim text.