Memory Technology
Random Access:
- “Random” is good: access time is the same for all locations
- DRAM: Dynamic Random Access Memory
- High density, low power, cheap, slow
- Dynamic: need to be “refreshed” regularly
- Main memory
- SRAM: Static Random Access Memory
- Low density, high power, expensive, fast
- Static: content will last “forever”(until lose power)
- Caches
“Not-so-random” Access Technology:
- Access time varies from location to location and from time to time
- Examples: Disk, CDROM
Sequential Access Technology: access time linear in location (e.g.,Tape)