Safeguarding of data recorded on disk by tunnel erase magnetic h

Details Safeguarding of data recorded on disk by tunnel erase magnetic h Safeguarding of data recorded on disk by tunnel erase magnetic h

1982-11-29

1984-04-10

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Recording-or erasing-prevention

360 66, G11B 1504, G11B 547

Patent

active

044424639

ABSTRACT:
Apparatus is provided for the safeguarding of data recorded on disk and diskettes by tunnel erase magnetic head assembly which comprise a read/write transducer for magnetically recording data along tracks on said disk and a pair of magnetic erase transducers adjacent to the read/write transducer for limiting the width of the recorded data. The apparatus for safeguarding the recorded data comprises apparatus for sensing the activation of the erase and/or read/write transducer and apparatus responsive to such sensed activation for determining if the activation is erroneous.

REFERENCES:
"Magnetic Tape Unit Failure Detection", W. Ashbee et al., IBM TDB, vol. 14, Nov. 7, 12/71.

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