F·16COMPUTER SCIENCE2025.02.031 MIN READ
RAM vs ROM: Why Data Vanishes (The Definitive Guide)
RAM vs ROM: 껐다 켜면 왜 데이터가 날아갈까? (완전정복)
From DRAM leakage currents to ECC, HBM, and real benchmarks (fio, sysbench). A developer's guide going beyond simple analogies.
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codemapo
INTERDISCIPLINARY DEV · SEOUL
11. Summary Table
| Term | Analogy | Physics | Latency | Power OFF | Example |
|---|
| Registers | Pocket Notes | Circuit | < 1 ns | Vanishes | Active Calculus |
| RAM (Memory) | Work Desk | Capacitor | ~100 ns | Vanishes | Running Apps, Redis |
| SSD (Storage) | Bookshelf | Floating Gate | ~0.1 ms | Persists | Files, DB, OS |
| HDD (Disk) | Basement | Magnetism | ~10 ms | Persists | Backups |