Disk drive modifying an update function for a refresh monitor in response to a measured duration
AssigneeWestern Digital Technologies, Inc.
InventorsWilliam B. Boyle, Michael S. Rothberg
Life of this patent
Estimating the term…
Abstract
A disk drive is disclosed including a disk, and a head actuated over the disk. A refresh monitor is maintained for data stored on the disk, wherein the refresh monitor comprises an update function responsive to an operating parameter of the disk drive. A duration monitor is maintained, and the update function of the refresh monitor is modified in response to the duration monitor. The data stored on the disk is refreshed in response to the refresh monitor.
Claims23
A disk drive comprising:
- a disk;
- a head actuated over the disk;
- and
- control circuitry operable to:
- maintain a refresh monitor for data stored on the disk, wherein the refresh monitor comprises an update function responsive to an operating parameter of the disk drive;
- maintain a duration monitor;
- modify the update function of the refresh monitor in response to the duration monitor;
- and
- refresh the data stored on the disk in response to the refresh monitor.
A method of operating a disk drive, the disk drive comprising a disk, and a head actuated over the disk, the method comprising:
- maintaining a refresh monitor for data stored on the disk, wherein the refresh monitor comprises an update function responsive to an operating parameter of the disk drive;
- maintaining a duration monitor;
- modifying the update function of the refresh monitor in response to the duration monitor;
- and
- refreshing the data stored on the disk in response to the refresh monitor.
A disk drive comprising:
- a disk;
- a head actuated over the disk;
- and
- control circuitry operable to:
- maintain a refresh monitor for data stored on the disk;
- maintain a duration monitor operable to track a drive-lifetime of the disk drive;
- modify the refresh monitor in response to the duration monitor;
- and
- refresh the data stored on the disk in response to the refresh monitor.
A disk drive comprising:
- a disk;
- a head actuated over the disk;
- a means for maintaining a refresh monitor for data stored on the disk, wherein the refresh monitor comprises a first update function responsive to an operating parameter of the disk drive;
- a means for maintaining a duration monitor;
- a means for modifying the first update function of the refresh monitor in response to the duration monitor;
- and
- a means for refreshing the data stored on the disk in response to the refresh monitor.
Dependencies are inferred from the claim text.