Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2005-04-19
2005-04-19
Tran, Sinh (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S025000, C360S031000, C711S112000, C711S170000
Reexamination Certificate
active
06882496
ABSTRACT:
A band of data storage tracks adjacent to an initial OD (outer diameter) limit are analyzed to determine a track defect density based on flagged tracks within the band. If the defect density exceeds a predetermined threshold, them the disk drive is reconfigured by adjusting initial OD and ID (inner diameter) limits to exclude the analyzed band and to maintain a targeted storage capacity. Adjusting the initial OD and ID limits improves the disk drive's seek performance which would otherwise be disproportionately impacted by the defect density in the analyzed band.
REFERENCES:
patent: 6301679 (2001-10-01), Tan
patent: 20040075933 (2004-04-01), Hetzler et al.
Codilian Raffi
Singh Dalwinder
C. Kim, Esq. Won Tae
Fawcett, Esq. Robroy R.
Olson Jason
Tran Sinh
Western Digital Technologies Inc.
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