Disk drive that refreshes data on portions of a disk based...

Details Disk drive that refreshes data on portions of a disk based... Disk drive that refreshes data on portions of a disk based...

2005-07-19

2008-03-18

Wellington, Andrea (Department: 2627)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

C360S053000

Reexamination Certificate

active

07345837

ABSTRACT:
A disk drive includes a rotatable data storage disk, a transducer, an actuator, and a controller. The transducer is configured to read and write data on the disk. The actuator is configured to position the transducer relative to defined portions of the disk. The controller is configured to determine how many times data has been written to the defined portions of the disk. The controller is also configured to refresh data residing at a particular one of the defined portions of the disk when the number of times data has been written to the particular defined portion of the disk satisfies a threshold value.

REFERENCES:
patent: 6809893 (2004-10-01), Uzumaki et al.
patent: 2004/0193798 (2004-09-01), Kuwamura
patent: 2004/0268033 (2004-12-01), Chia et al.
patent: 2005/0168859 (2005-08-01), Cho et al.
patent: 2005/0180267 (2005-08-01), Jeong et al.
patent: 2006/0066971 (2006-03-01), Alex et al.
patent: 2006/0245102 (2006-11-01), Cheng

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