DATA STORAGE DEVICE AND DATA STORAGE METHOD

DATA STORAGE DEVICE AND DATA STORAGE METHOD

PROBLEM TO BE SOLVED: To provide a data storage device and a data storage method that reduce the number of times of erasure by reducing the amount of data to be written each time the data is generated, and efficiently use a memory to which overwrite is impossible.SOLUTION: Each time data is generate...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: OE HIDEKI, TAKABAYASHI WATARU, OBATA SHIGEO
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a data storage device and a data storage method that reduce the number of times of erasure by reducing the amount of data to be written each time the data is generated, and efficiently use a memory to which overwrite is impossible.SOLUTION: Each time data is generated, a CPU 2A stores the data while adding data types to the ending of the data generated in order from the head of a vacant area of the latest block. When there is no vacant area in the latest block, the CPU 2A erases all the data of other blocks except the latest block, then reads the data in order from the ending of the latest block, and extracts every predetermined number of pieces of data backward by the data types added to the ending of the data based upon the data types, and writes the extracted data in order from heads of other blocks.