Embedded SSD Flash Management

This white paper will explore NAND flash technology and its inherent problems, and explain how proper flash management algorithms can address these issues and transform NAND flash into a reliable media with a long lifespan.

The discussion will focus on single-level Cell (SLC) flash technology, due to its added reliability over multi-level cell (MLC) NAND flash. The flash management algorithms
addressed in this document are implemented in the proprietary flash controllers HGST uses in its small-format embedded products: e.g., CompactFlash, embedded SATA, etc.

By utilizing a combination of
strong wear leveling techniques, an effective ECC engine and a diligent bad block management system, the life expectancy of embedded flash products can be greatly maximized.

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