Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2007-02-13
2007-02-13
Kim, Matthew (Department: 2186)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C360S060000
Reexamination Certificate
active
10674763
ABSTRACT:
Where a leakage magnetic field deletes data on adjacent tracks gradually, such deletion is compensated so as to prevent data errors from occurring. A magnetic disk device includes one or more magnetic disks, one or more magnetic heads, and a write and read circuit for writing or reading data, and writes or reads the data on tracks on the magnetic disks. The number of writes of the data on a given track is acquired. If the number of writes reaches a predetermined number, the data on the tracks adjacent to a given track is read out once and, then, the data is rewritten on the adjacent tracks. Further, when the data is written on the tracks, the data is written on alternate physical tracks and every other track is skipped, and after the data is written on half of all tracks, the data is written on the skipped tracks.
REFERENCES:
patent: 6462896 (2002-10-01), Codilian et al.
patent: 2002/0138692 (2002-09-01), Gerhart
patent: 05334015 (1993-12-01), None
patent: 06-236504 (1994-08-01), None
patent: 2001-338468 (2001-12-01), None
patent: 2001-350596 (2001-12-01), None
Hitachi Global Storage Technologies Japan Ltd.
Kim Matthew
Thomas Shane M.
Townsend and Townsend / and Crew LLP
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