Temperature-based data refreshing
Systems and methods are disclosed for managing temperature in a data storage device. A data storage device includes non-volatile solid-state memory, a temperature sensor, a heating device, and a controller. The controller is configured to receive a temperature signal from the temperature sensor indicating a temperature of at least a portion of the data storage device, determine that the temperature is below a first predetermined threshold, activate the heating device to increase the temperature of the at least a portion of the data storage device, and write data associated with a write command to the non-volatile solid-state memory.
1. A data storage device comprising:
non-volatile media; and
a controller configured to:
write host data associated with a write command to the non-volatile media while a temperature of the at least a portion of the data storage device is at a first level below a predetermined threshold;
store write indication data, the write indication data indicating that the host data was written to the non-volatile media while the temperature of the at least a portion of the data storage device was below the predetermined threshold;
determine that the temperature of the at least a portion of the data storage device has risen to a second level that is above the predetermined threshold; and
based at least in part on the determination that the temperature of the at least a portion of the data storage device has risen to the second level, re-write the previously-written host data in the non-volatile media.
2. The data storage device of claim 1 , wherein said re-writing the previously-written host data comprises prioritizing a data maintenance operation associated with a portion of the non-volatile media in which the host data was written.
3. The data storage device of claim 2 , wherein the non-volatile media comprises solid-state media and the data maintenance operation is a garbage collection operation.
4. The data storage device of claim 1 , wherein said re-writing the previously-written host data is performed in response to the determination that the temperature of the at least a portion of the data storage device has risen to the second level.
5. The data storage device of claim 1 , wherein the controller is further configured to:
prior to writing the host data to the non-volatile media, determine that a critical write condition exists; and
perform said writing the host data to the non-volatile media in response to the determination that the critical write condition exists.
6. The data storage device of claim 1 , wherein:
the non-volatile media comprises solid-state media; and
the write indication data is associated with a block of the solid-state media in which the host data is stored.
7. The data storage device of claim 6 , wherein the write indication data represents a lowest write temperature of data stored in the block.
8. The data storage device of claim 1 , wherein the controller is further configured to:
perform an integrity scan associated with the non-volatile media;
determine that the host data was written when the temperature of the at least a portion of the data storage device was below the predetermined threshold based on the integrity scan; and
perform said re-writing the previously-written host data in response to the determination that the host data was written when the temperature of the at least a portion of the data storage device was below the predetermined threshold.
9. A data storage device comprising:
non-volatile data storage media;
means for determining temperature;
means for generating heat within the data storage device; and
a controller configured to:
receive a write command from a host to write host data to the non-volatile data storage media;
determine a temperature of at least a portion of the data storage device using the means for determining temperature;
determine that the temperature of the at least a portion of the data storage device is below a first threshold;
increase the temperature of the at least a portion of the data storage device using the means for generating heat; and
when it is determined that the temperature of the at least a portion of the data storage device has risen above a second threshold, write the host data to the non-volatile data storage media.
10. The data storage device of claim 9 , wherein the first threshold and the second threshold are the same.
11. The data storage device of claim 9 , wherein:
the non-volatile data storage media comprises magnetic disk media; and
the means for generating heat comprises circuitry configured to:
store data including intentionally-introduced errors in one or more reserved tracks of the magnetic disk media; and
read the data stored in the one or more reserved tracks of the magnetic disk media to generate heat.
12. The data storage device of claim 9 , wherein:
the non-volatile data storage media comprises magnetic disk media; and
the means for generating heat comprises circuitry configured to perform read operations on a solid-state memory device separate from the non-volatile data storage media to generate heat within the data storage device.
13. The data storage device of claim 9 , wherein the controller is further configured to:
determine whether a critical write condition exists; and
perform said increasing the temperature of the at least a portion of the data storage device when it is determined that the critical write condition does not exist.
14. The data storage device of claim 13 , wherein the controller is further configured to write the host data to the non-volatile data storage media while the temperature of the at least a portion of the data storage device is below the first threshold when it is determined that the critical write condition exists.
15. A method for refreshing data in a data storage device, the method comprising:
writing host data associated with a write command to non-volatile media of the data storage device while a temperature of at least a portion of a data storage device is at a first level below a first predetermined threshold;
storing write indication data, the write indication data indicating that the data was written to the non-volatile media while the temperature of the at least a portion of the data storage device was below the first predetermined threshold;
determining that the temperature of the at least a portion of the data storage device has risen to a second level that is above a second predetermined temperature threshold; and
based at least in part on the determination that the temperature of the at least a portion of the data storage device has risen to the second level, re-writing the previously-written host data in the non-volatile media.
16. The method of claim 15 , further comprising prioritizing a data maintenance operation associated with a portion of the non-volatile media in which the host data was written based on the determination that the temperature of the at least a portion of the data storage device has risen to the second level.
17. The method of claim 15 , wherein said re-writing the previously-written host data is performed in response to the determination that the temperature of the at least a portion of the data storage device has risen to the second level.
18. The method of claim 15 , further comprising:
prior to writing the host data to the non-volatile media, determining that a critical write condition exists; and
performing said writing the host data to the non-volatile media in response to the determination that the critical write condition exists.
19. The method of claim 15 , wherein the write indication data is stored on a block-level with respect to solid-state media of the non-volatile media.
20. The method of claim 15 , further comprising:
scanning the non-volatile media to determine that the host data was written to the non-volatile media when the temperature of the at least a portion of the data storage device was below the first predetermined threshold; and
performing said re-writing the previously-written host data in response to the determination that the host data was written when the temperature of the at least a portion of the data storage device was below the first predetermined threshold.