Disk drive biasing refresh zone counters based on write commands

1. A disk drive comprising:

a disk comprising a plurality of tracks;

a head actuated over the disk; and

control circuitry operable to:

define a plurality of refresh zones, wherein each refresh zone corresponds to a plurality of the tracks;

first write data to a first refresh zone, and update a first zone counter for a second refresh zone at a first rate; and

second write data to a third refresh zone, and update the first zone counter for the second refresh zone at a second rate different than the first rate.

2. The disk drive as recited in claim 1 , wherein the control circuitry is further operable to update a second zone counter of a fourth refresh zone at a third rate in response to the first write.

3. The disk drive as recited in claim 2 , wherein the third rate is different than the first rate.

4. The disk drive as recited in claim 2 , wherein:

the second refresh zone is adjacent to the first refresh zone; and

the fourth refresh zone is not adjacent to the first refresh zone.

5. The disk drive as recited in claim 2 , wherein:

the second refresh zone is located toward an outer diameter of the disk away from the first zone; and

the fourth refresh zone is located toward an inner diameter of the disk away from the first zone.

6. The disk drive as recited in claim 2 , wherein the third rate varies based on an ambient temperature of the disk drive.

7. A disk drive comprising:

a disk comprising a plurality of tracks;

a head actuated over the disk; and

control circuitry operable to:

define a plurality of refresh zones, wherein each refresh zone corresponds to a plurality of the tracks;

write data to a first refresh zone in response to a write command; and

update a first zone counter for the first refresh zone at a first rate based on a type of the write command.

8. The disk drive as recited in claim 7 , wherein the type of the write command comprises a logical block address range.

9. The disk drive as recited in claim 8 , wherein the write command identifies a first logical block address range and the control circuitry is further operable to:

write data to a second refresh zone in response to a second write command identifying a second logical block address range; and

update a second zone counter for the second refresh zone at a second rate different than the first rate.

10. The disk drive as recited in claim 7 , wherein the type of the write command comprises a block size of the first write command.

11. The disk drive as recited in claim 7 , wherein the type of the write command comprises a write continuous command indicating the first write command will be completed when a write error is encountered.

12. The disk drive as recited in claim 7 , wherein the type of the write command comprises one of a non-streaming command and a streaming command.

13. A method of operating a disk drive, the disk drive comprising a disk comprising a plurality of tracks, and a head actuated over the disk, the method comprising:

defining a plurality of refresh zones, wherein each refresh zone corresponds to a plurality of the tracks;

first writing data to a first refresh zone, and updating a first zone counter for a second refresh zone at a first rate; and

second writing data to a third refresh zone, and updating the first zone counter for the second refresh zone at a second rate different than the first rate.

14. The method as recited in claim 13 , further comprising updating a second zone counter of a fourth refresh zone at a third rate in response to the first write.

15. The method as recited in claim 14 , wherein the third rate is different than the first rate.

16. The method as recited in claim 14 , wherein:

the second refresh zone is adjacent to the first refresh zone; and

the fourth refresh zone is not adjacent to the first refresh zone.

17. The method as recited in claim 14 , wherein:

the second refresh zone is located toward an outer diameter of the disk away from the first zone; and

the fourth refresh zone is located toward an inner diameter of the disk away from the first zone.

18. The method as recited in claim 14 , wherein the third rate varies based on an ambient temperature of the disk drive.

19. A method of operating a disk drive, the disk drive comprising a disk comprising a plurality of tracks, and a head actuated over the disk, the method comprising:

defining a plurality of refresh zones, wherein each refresh zone corresponds to a plurality of the tracks;

writing data to a first refresh zone in response to a write command; and

updating a first zone counter for the first refresh zone at a first rate based on a type of the write command.

20. The method as recited in claim 19 , wherein the type of the write command comprises a logical block address range.

21. The method as recited in claim 20 , wherein the write command identifies a first logical block address range, the method further comprising:

writing data to a second refresh zone in response to a second write command identifying a second logical block address range; and

updating a second zone counter for the second refresh zone at a second rate different than the first rate.

22. The method as recited in claim 19 , wherein the type of the write command comprises a block size of the first write command.

23. The method as recited in claim 19 , wherein the type of the write command comprises a write continuous command indicating the first write command will be completed when a write error is encountered.

24. The method as recited in claim 19 , wherein the type of the write command comprises one of a non-streaming command and a streaming command.