Data retention prioritization for a data storage device

摘要

A data storage device with a cache memory in communication with a control processor programmed with a data retention prioritization routine to effect data throughput with a host device. The data storage device includes an apparatus responsive to the control processor retrieving host data along with speculative data. The cache memory storing the host data in addition to the speculative data, wherein the speculative data includes both read on arrival data and read look ahead data. The control processor executing the data prioritization routine to prioritize removal of the host data from the cache memory prior to removal of the read on arrival data while maintaining persistence of the read look ahead data in the cache memory subsequent to removal of the read on arrival data.