Disk drive aborting a write command before a last target sector reached if an abnormal condition detected and selecting a second command according to a rotational positioning optimization algorithm

摘要

A disk drive is disclosed wherein if a write command is aborted, the write command is re-executed according to a rotational position optimization (RPO) algorithm rather than immediately re-executing the write command to better optimize drive performance relative to mechanical latencies. An aborted write command is replaced into an input/output queue together with other pending commands. The aborted write command is eventually re-selected for execution by the RPO algorithm when executing the write command minimizes mechanical latencies relative to the other pending commands.