Simultaneously writing to and erasing two commonly numbered sect

Details Simultaneously writing to and erasing two commonly numbered sect Simultaneously writing to and erasing two commonly numbered sect

1997-08-18

1999-11-09

Robertson, David L.

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

711168, G06F 1200

Patent

active

059833122

ABSTRACT:
Data transferred from a host computer to a memory device is written into sectors whose addresses in a memory area are decoded by a decode table. Old data to be updated by the above data is erased or marked with erase flags. At a predetermined point of time, in order to create free areas, necessary data is evacuated to a primary memory media and unnecessary data indicated by erase flags is erased by a unit of predetermined memory size. Part of the memory media which has become defective is marked with a defect flag, and is replaced by an alternate area. In doing so, the decode table is rewritten to rearrange the memory area.

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