NAND Flash in Embedded Devices File Systems, Partitions, and Wear Leveling land

NAND Flash has become the foundation of modern embedded storage, powering microcontrollers, IoT gateways, routers, and industrial control systems. It provides high density, low power consumption, and non-volatile persistence — but demands careful software and hardware design.

At the surface, NAND seems simple: just non-volatile memory with pages and blocks. In practice, however, its complexity lies beneath — limited endurance, bad blocks, wear-leveling requirements, and ECC management. These challenges turn NAND into one of the most fascinating yet unforgiving components in embedded design.

This article explores the deeper aspects of NAND flash design for advanced embedded engineers — from ECC and UBI layers to wear leveling, partitioning, and power-loss protection — showing both the theory and practical code used in real devices.

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