Storage Device, Memory Management Method and Program
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Oct 18, 2007
app pub date -
Sep 8, 2005
filing date -
Sep 10, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A physical group address is allocated to a storage area of a flash memory (11) for each group as units smaller than a block as units of data erasing, and the group includes multiple pages and the page includes multiple columns. When writing data and a logical address of a writing destination are supplied, a CPU (121) writes the data in a column in the group indicated by a writing pointer to associate the supplied logical address with the column. A relationship between the physical group address of the group having this column and the logical group address is stored in a logical/physical conversion table of a RAM (123). Data stored in the block is erased when the number of blocks having no empty block reaches a predetermined number or less.
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