Servo edge correction using edge samples taken by independently

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head

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G11B 5584

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active

059461594

ABSTRACT:
Accurate tape servo track following is achieved by sampling servo edges at tape head alignments established with non-servo information, and processing the samples to (1) estimate optimal tape head index positioning to best align data as well as servo components, and (2) provide corrected position error signals (PESs) including a calculated error for comparison during ongoing servo track following to maintain the tape head at an optimal alignment for accurate alignment with the servo edges as well as data tracks on the tape.

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patent: 5488525 (1996-01-01), Adams et al.
Jahnke, R. C., "Track-Locating and Following Apparatus for a Flexible Disk File", IBM Technical Disclosure Bulletin, vol. 23, No. 2, Jul. 1980, pp. 738-742.
"Median Selection of Position Error Signals in a Data Recording Disk File", IBM Technical Disclosure Bulletin, vol. 29, No. 12, May 1987, pp. 5239-5240.

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