Block management and replacement method, flash memory...

Details Block management and replacement method, flash memory... Block management and replacement method, flash memory...

2008-12-04

2011-12-06

Kerveros, James C (Department: 2117)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Replacement of memory spare location, portion, or segment

Reexamination Certificate

active

08074128

ABSTRACT:
A block management and replacement method for a flash memory is provided. The method includes grouping physical blocks of the flash memory into physical units and dividing the physical units as a usage area and a replacement area, wherein the physical blocks grouped into the same physical unit are accessed by using a multi-planes accessing command. The method also includes when one of the physical block of the physical unit in the usage area is damaged, replacing the physical unit having the damaged physical block with one physical unit selected from the replacement area and recording the undamaged physical block within the replaced physical unit if there is an applicable physical unit in the replacement area; and replacing the damaged physical block with one physical block selected from the replacement area if there is no applicable physical unit but an undamaged physical block in the replacement area.

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