How SSDs & Flash Memory Work
Trapping microscopic electron charges inside 3D NAND floating gates with zero moving parts.
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Step 11. NVMe PCIe Request
Host CPU sends DMA read command over PCIe 4.0 lanes.
The SSD Controller looks up physical block and page addresses in its high-speed LPDDR4 DRAM translation cache.
Step 1 of 4How SSDs & Flash Memory Work
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Unlike spinny magnetic hard drives, SSDs store your files as trapped electrical charges inside tiny silicon cages.
Key Takeaways
- ✓SSDs have zero moving mechanical parts, making them immune to vibration and 100x faster than HDDs.
- ✓Data is stored by trapping electrons behind microscopic silicon barriers.
- ✓Trapped electrons stay in place for years even when the power is completely unplugged.
Memory That Never Forgets
Traditional Hard Disk Drives (HDDs) used spinning magnetic metal platters and a mechanical reading needle — like a record player spinning at 7,200 RPM.A Solid State Drive (SSD) is pure electronic circuitry. It stores data in Flash Memory (NAND) cells. Each cell contains a microscopic electrical "trap" (Floating Gate or Charge Trap). When electrons are pushed into the trap, they stay locked inside for years, representing a binary 0 or 1.Interactive Challenge+25 XP