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Handling Oxide Voids and Tape Crease Errors

IP.com Disclosure Number: IPCOM000081524D
Original Publication Date: 1974-Jun-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Cary, CR: AUTHOR [+4]

Abstract

A method of handling oxide voids and tape creases in a magnetic tape apparatus includes the steps of reversing the tape and sensing for data loss. If a data loss is sensed, a Move command is dropped, and a long "Go" command is given, thereby initiating a search for a false IBG (interblock gap).

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Handling Oxide Voids and Tape Crease Errors

A method of handling oxide voids and tape creases in a magnetic tape apparatus includes the steps of reversing the tape and sensing for data loss. If a data loss is sensed, a Move command is dropped, and a long "Go" command is given, thereby initiating a search for a false IBG (interblock gap).

During the search period, if the presence of data is sensed, the Move command is given for further reverse movement of the tape, until a data loss is again sensed. At the time that no data is sensed, then a true IBG has been detected and the position identified. At such time, the read head may then be properly positioned with respect to the tape.

By this technique, oxide voids and tape creases that occur after a tape has been recorded are handled without misposition of the head relative to the tape.

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