Rotational Position Optimization (RPO) Disk Scheduling

Walter Burkhard and John Palmer
July 16, 2001

Rotational position optimization disk scheduling algorithms utilize seek distance versus rotational distance information implemented as rpo tables (arrays) which are stored in flashmemory within each disk drive. We consider a novel representation scheme for this information reducing the required flashmemory by a factor of more than thirty thereby reducing the manufacturing cost per drive. We present simulation results showing the throughput for conservative and aggressive versions of the scheme as well as comparative results with the standard production drives not using these results.

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