Hybrid drive copying disk cache to non-volatile semiconductor memory

摘要

A hybrid drive is disclosed comprising a head actuated over a disk comprising a plurality of data sectors. The hybrid drive further comprises a non-volatile semiconductor memory (NVSM) comprising a plurality of memory segments. A disk cache is defined comprising a first plurality of the data sectors, and a non-cache area of the disk is defined comprising a second plurality of the data sectors. When a write command is received from a host, data is written to the disk cache, and under certain conditions, the data is copied from the disk cache to the NVSM.

主权项

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; control circuitry operable to:
define a disk cache comprising a first plurality of the data sectors;define a non-cache area of the disk comprising a second plurality of the data sectors;receive a write command from a host, the write command comprising data;write the data to the disk cache; andcopy the data from the disk cache to the NVSM.