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I/O Devices (cont)

Solid State Disk (SSD) characteristics:
  • high capacity (GB), high cost, reading faster than writing
  • pages 512B..4KB, blocks 32..128 pages, R/W page-at-a-time
  • pages updated by erase then write,  limit on #updates
  • avg read time 11×10-6 sec,   avg write time 15×10-6 sec

[Diagram:Pics/devices/ssd.png]