WRITE AND RETIRE PAGES IN QLC NAND BLOCKS

WRITE AND RETIRE PAGES IN QLC NAND BLOCKS

A technique for writing data to pages in a QLC block of a QLC NAND flash memory device, where the device comprises a plurality of SLC pages organized in SLC blocks and a plurality of QLC pages organized in QLC blocks. The technique comprises storing received data in SLC pages, dividing equally a QLC...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Papandreou, Nikolaos, Fisher, Timothy J, Pletka, Roman Alexander, Walls, Andrew D, Fry, Aaron Daniel, Pozidis, Charalampos, Stoica, Radu Ioan
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Beschreibung
Zusammenfassung:A technique for writing data to pages in a QLC block of a QLC NAND flash memory device, where the device comprises a plurality of SLC pages organized in SLC blocks and a plurality of QLC pages organized in QLC blocks. The technique comprises storing received data in SLC pages, dividing equally a QLC block in a predefined number of sub-blocks according to a corresponding QLC page health status of the pages of the QLC block. Upon determining that SLC pages are to be copied from SLC pages to QLC pages, copying device-internal the respective SLC pages to the sub-blocks of the QLC block using device-internal cache registers, where the copying is based on an error-count aware scheme.