Error recovery procedure using selective erasure

Details Error recovery procedure using selective erasure Error recovery procedure using selective erasure

1982-12-27

1985-05-07

Cardillo, Jr., Raymond F.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data verification

360 13, 360118, G11B 2110, G11B 2708

Patent

active

045161658

ABSTRACT:
The data recovery procedure for errors caused by track occlusion as a result of adjacent track misregistration or head sensitivity to the low frequency content of adjacent tracks is effected by reading and storing the information from the adjacent tracks and thereafter erasing the adjacent tracks either on centerline or with the transducer offset toward the intermediate track of interest. The track of interest can then be read with the transducer aligned with the track centerline and at varying positions of offset. If this sequence of rereads fails, the erase step can be repeated with greater amounts of offset toward the intermediate track to further reduce inband interference and the reread sequence also repeated.

REFERENCES:
patent: 3801963 (1974-04-01), Chen
patent: 3869721 (1975-03-01), Korda
Barrett et al., Bidirectional Read-After-Write Tunnel Erase Head, IBM Technical Disclosure Bulletin, vol. 16, No. 12, May 1974.

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