Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data verification
Reexamination Certificate
2005-02-01
2005-02-01
Tran, Sinh (Department: 2651)
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data verification
C360S075000, C711S207000
Reexamination Certificate
active
06850379
ABSTRACT:
A method for registering a defect map within a hard disk drive is disclosed. A hard disk drive includes a recording disk, a head assembly, and a controller. Multiple sectors are formed on the recording disk, and the head assembly includes a head for reading/writing data from/to the recording disk. The controller, which controls the head assembly to read/write data from/to the recording disk, includes a defect sector positional information holding device and a sector identification device. The defect sector positional information holding device holds positional information of a defect sector disabled to read/write data therefrom/thereto the recording disk. The positional information includes the number of the defect sectors continued in a circumferential direction and in a radial direction of the recording disk. The sector identification device refers to the positional information of the defect sector so as to identify a target sector from/in which data is to be read/written when a read/write command is received from a host computer.
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Andoh Haruo
Kuroda Takashi
Satoh Toshiaki
Yokoe Yuhji
Dillon & Yudell LLP
Habermehl James L
Hitachi Global Storage Technologies - Netherlands B.V.
Martin Robert B.
Tran Sinh
LandOfFree
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