Technique for certifying disk recording surface

Details Technique for certifying disk recording surface Technique for certifying disk recording surface

1989-03-31

1991-09-10

Envall, Jr., Roy N.

Dynamic magnetic information storage or retrieval

Checking record characteristics or modifying recording...

360 25, 360 31, 324210, 369 53, 369 58, G11B 502

Patent

active

050478745

ABSTRACT:
Techniques for certifying recording sites (bit sites) on magnetic recording disks wherein test recording patterns are recorded along disk tracks: first in an analog mode, then in a digital mode; concluding in a full digital test that simulates customer operation.

REFERENCES:
patent: 3633187 (1972-01-01), Proctor et al.
patent: 3659195 (1972-04-01), Cardozo et al.
patent: 3761905 (1973-09-01), Hollstein et al.
patent: 3781835 (1973-11-01), Dion
patent: 4656420 (1987-04-01), Felleisen et al.

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