Failure Management MEMS devices will have internal failures –Tips will break during fabrication/assembly, use –Media can wear ECC can be both horizontal and vertical Could then use spares to regain original level of reliability
Performance Models Generation 1 Generation 2 Generation 3 Reference disk – Atlas 10k Super disk
Random Workload - Microbenchmark
Power Utilization Lower operating power –100 mW for sled positioning –1 mW per active tip –For 1000 active tips, total power is 1.1 watt –50 mW standby mode Fast transition from standby – 0.5 ms
Future Potential Definite advantages Portable applications New low-cost entry point Archival storage Active storage devices Throwaway devices …
Problems? Very little has been implemented Power consumption? Heat – kinetic energy? Reliability? Sturdiness? Any other alternatives?
Conclusions Potential to fill the RAM/Disk gap Simulation results show –reductions in I/O stall times – overall performance improvement We’ll have to wait and see …