Patent ID: 6854022

Claim:
A disk drive comprising: (a) a disk comprising a plurality of concentric tracks, each track comprising a plurality of data sectors; (b) a head actuated radially over the disk; (c) an input/output (I/O) queue for storing read and write commands received from a host computer; and (d) a disk controller for performing the commands stored in the I/O queue in an order determined from a rotational positioning optimization (RPO) algorithm, wherein the disk controller for: selecting a write command from the I/O queue according to the RPO algorithm; seeking the head to a target track and writing data to a target data sector; inserting a write verify command into the I/O queue; selecting the write verify command from the I/O queue according to the RPO algorithm and executing the write verify command to verify the recoverability of the data written to the target data sector.