Patent ID: 8825976
Filing Date: 2014-09-02
Classification: G06F

Abstract:
1. A hybrid drive comprising: a disk comprising a plurality of data sectors; a head actuated over the disk; a non-volatile semiconductor memory (NVSM) comprising a plurality of memory segments; and control circuitry operable to: map a logical block address (LBA) to a data sector on the disk; detect a start of a host boot operation; execute a biased migration policy during a bias interval following the start of the boot operation, wherein the biased migration policy increases a likelihood of migrating the LBA to the NVSM; execute a normal migration policy after the bias interval; migrate the LBA to the NVSM in response to the normal and biased migration policies by: maintain a read counter for the LBA; and bias the migration of the LBA to the NVSM during the bias interval based on the read counter.