September 22, 2026
3.3 Primary and Secondary Data Storage
Memory Hierarchy and Storage Media Categorization of computer memory based on volatility, access speed, and capacity. Primary Storage: RAM (Random Access Memory – volatile, read/write, holds active OS and programs) vs. ROM (Read Only Memory – non-volatile, read-only, holds bootstrap firmware/BIOS). Secondary Storage: Non-volatile persistent storage. Divided into: Magnetic (HDD – moving platters and read/write […]