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Flash knowledge

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Yoshi Shih-Chieh Huang

This document discusses technologies related to solid state drives including flash translation layers, wear leveling, garbage collection, bad block management, error correction codes, and disk interfaces. It mentions specific file systems and technologies used for NAND flash memory in SSDs like F2FS, flash file systems, memory technology devices, and customized protocols for raw NAND flash chips.

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F2FS Flash Translation Layer (FTL) Wear Leveling Garbage Collection Bad Block Management ECC NAND Flash ChipSSD 盒裝 Block Device Driver Read Cache & Write Buffer in Kernel eMMCSATA USB File SystemDisk-based interface M2 UFS pdflush (periodically flush dirty data to physical devices)
Flash FS (JAFFS, UBIFS, YAFFS, …) MTD NAND Flash Raw Chip Customized protocol

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Flash knowledge

  • 1. F2FS Flash Translation Layer (FTL) Wear Leveling Garbage Collection Bad Block Management ECC NAND Flash ChipSSD 盒裝 Block Device Driver Read Cache & Write Buffer in Kernel eMMCSATA USB File SystemDisk-based interface M2 UFS pdflush (periodically flush dirty data to physical devices)
  • 2. Flash FS (JAFFS, UBIFS, YAFFS, …) MTD NAND Flash Raw Chip Customized protocol