Disk drive biasing a refresh monitor with write parameter of a write operation
View Patent ↗A disk drive is disclosed including a disk, and a head actuated over the disk. Control circuitry within the disk drive is operable to receive a write operation for a refresh zone of the disk, measure a write operation quality parameter that affects the quality of the write operation, and perform the write operation. An update function is enabled in connection with performing the write operation, wherein the update function is operable to update a refresh monitor as a function of the write operation and the write operation quality parameter. Data stored in the refresh zone of the disk is refreshed in response to the refresh monitor.
1. A disk drive comprising:
a disk;
a head actuated over the disk;
control circuitry operable to:
receive a write operation for a refresh zone of the disk;
measure a write operation quality parameter that affects the quality of the write operation during the write operation;
perform the write operation;
enable an update function in connection with performing the write operation, wherein the update function is operable to update a refresh monitor as a function of the write operation and the write operation quality parameter; and
refresh data stored in the refresh zone of the disk in response to the refresh monitor.
2. The disk drive as recited in claim 1 , wherein the write operation quality parameter comprises an ambient temperature.
3. The disk drive as recited in claim 1 , wherein the write operation quality parameter comprises at least one of an ambient temperature, altitude, a fly-height heater parameter, a write current amplitude, a write current overshoot, a skew angle of the head, a width of the head, a data density of data recorded on the disk, and a servo parameter.
4. The disk drive as recited in claim 1 , wherein:
the control circuitry is further operable to measure a plurality of write operation quality parameters that affect the quality of the write operation; and
the update function is operable to update the refresh monitor as a function of the write operation and the plurality of write operation quality parameters.
5. The disk drive as recited in claim 1 , wherein the update function is operable to update the refresh monitor as a function of the write operation, the write operation quality parameter, and a duration of the data stored in the refresh zone.
6. The disk drive as recited in claim 5 , wherein the update function is further operable to update the refresh monitor as a function of an ambient temperature over the duration of the data stored in the refresh zone.
7. The disk drive as recited in claim 5 , wherein:
the write operation quality parameter comprises an ambient temperature at the time of the write operation; and
the update function is further operable to update the refresh monitor as a function of an ambient temperature over the duration of the data stored in the refresh zone.
8. A method of operating a disk drive, the disk drive comprising a disk, and a head actuated over the disk, the method comprising:
receiving a write operation for a refresh zone of the disk;
measuring a write operation quality parameter that affects the quality of the write operation during the write operation;
performing the write operation;
enabling an update function in connection with performing the write operation, wherein the update function is operable to update a refresh monitor as a function of the write operation and the write operation quality parameter; and
refreshing data stored in the refresh zone of the disk in response to the refresh monitor.
9. The method as recited in claim 8 , wherein the write operation quality parameter comprises an ambient temperature.
10. The method as recited in claim 8 , wherein the write operation quality parameter comprises at least one of an ambient temperature, altitude, a fly-height heater parameter, a write current amplitude, a write current overshoot, a skew angle of the head, a width of the head, a data density of data recorded on the disk, and a servo parameter.
11. The method as recited in claim 8 , further comprising measuring a plurality of write operation quality parameters that affect the quality of the write operation, wherein the update function is operable to update the refresh monitor as a function of the write operation and the plurality of write operation quality parameters.
12. The method as recited in claim 8 , wherein the update function is operable to update the refresh monitor as a function of the write operation, the write operation quality parameter, and a duration of the data stored in the refresh zone.
13. The method as recited in claim 12 , wherein the update function is further operable to update the refresh monitor as a function of an ambient temperature over the duration of the data stored in the refresh zone.
14. The method as recited in claim 12 , wherein:
the write operation quality parameter comprises an ambient temperature at the time of the write operation; and
the update function is further operable to update the refresh monitor as a function of an ambient temperature over the duration of the data stored in the refresh zone.