Electrical computers and digital processing systems: memory – Address formation – Address mapping
Reexamination Certificate
2011-01-25
2011-01-25
Nguyen, Than (Department: 2187)
Electrical computers and digital processing systems: memory
Address formation
Address mapping
C711S103000, C711S206000
Reexamination Certificate
active
07877569
ABSTRACT:
A nonvolatile storage device can read and write data by receiving a logical address from a host. The nonvolatile storage device includes: a nonvolatile memory writing and reading data based on a physical address; a logical/physical conversion table storing information on correspondence between the logical address and the physical address for each of a plurality of data management units; a duplication table storing information on correspondence between the logical address and the physical address of data arranged over a plurality of areas in a duplicate (redundant) manner in the nonvolatile memory and having a size smaller than a size of a data management unit; and a controller controlling an operation of the nonvolatile storage device. The controller permits duplicate (redundant) writing of data having a same logical address as the data (which has been written in one data management unit in another data management unit), and the controller performs a plurality of write modes for the duplicate (redundant) writing, and selectively switches between the write modes according to situation of a logical address change designated by the host.
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Supplementary European Search Report issued Jul. 30, 2008 in the Application No. EP 05 73 6975.
Nguyen Than
Panasonic Corporation
Wenderoth , Lind & Ponack, L.L.P.
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