Smart retry operation

Details Smart retry operation Smart retry operation

2006-02-21

2006-02-21

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data verification

C360S046000, C360S031000, C360S039000, C360S077040, C369S053100, C369S053350

Reexamination Certificate

active

07002765

ABSTRACT:
A smart retry operation, or set of retry procedures to be performed in sequence, that optimizes itself for a data storage device's individual characteristics, including variations across the data storage media and variations introduced as the device degrades over time, is disclosed. The data storage media (e.g. a disc in a disc drive) is divided into a number of zones and a separate smart retry operation is maintained for each zone. The data storage media is then tested to find errors correctable by the retry procedures. A statistical likelihood for each retry procedure is developed. The sequential order of the retry procedures in each zone's operation is then optimized based on the statistics. A single read/write retry sequences or separate read and write retry sequences may be maintained. The retry operations may be constantly re-optimized over the lifetime of the data storage device.

REFERENCES:
patent: 5721816 (1998-02-01), Kusbel et al.
patent: 6084733 (2000-07-01), Ohzeki et al.
patent: 6122235 (2000-09-01), Arai
patent: 6188538 (2001-02-01), Mills et al.

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