Disk drive with recent write streams list for data refresh determination

摘要

A disk drive is disclosed comprising a disk comprising a plurality of refresh regions, each refresh region comprising a range of logical block addresses (LBAs). The disk drive further comprises a recent write streams list comprising one or more entries, each entry representing an LBA stream. The disk drive further comprises a head actuated radially over the disk to write data to and read data from the disk, and control circuitry coupled to the head, wherein the control circuitry is operable to execute a write command comprising one or more LBAs, determine whether the one or more LBAs are sequential to an entry in the recent write streams list, modify an entry in the recent write streams list when the one or more LBAs are sequential to the entry, and utilize the modified entry to determine whether to reset a refresh counter associated with a refresh region.

主权项

1. A disk drive comprising:
a disk comprising a plurality of refresh regions, each refresh region comprising a range of logical block addresses (LBAs); a memory separate from the plurality of refresh regions on the disk, the memory storing a recent write streams list comprising one or more entries, each entry representing an LBA stream; a head actuated radially over the disk to write data to and read data from the disk; and control circuitry coupled to the head, the control circuitry operable to:
execute a write command comprising one or more LBAs;determine whether the one or more LBAs in the write command are sequential to an entry in the recent write streams list;modify an entry in the recent write streams list when the one or more LBAs in the write command are sequential to the entry;determine whether the modified entry entirely overlaps a refresh region; andif it is determined that the modified entry entirely overlaps the refresh region, reset an associated refresh counter based on the determination that the modified entry entirely overlaps the refresh region.