Temperature-adjusted power-on data retention time tracking for solid state drives
In general, embodiments of the invention relate tracking the operating temperature of the solid-state memory modules (SSMMs) in order to improve their performance.
1. A method for managing a solid state memory module, the method comprising:
obtaining a temperature reading for the solid state memory module;
determining a counter increment value for a counter, wherein the counter is associated with a block in the solid state memory module, and wherein the counter increment value is determined using the temperature reading;
updating a counter value for the counter using the counter increment value to obtain an updated counter value;
making a determination that the updated counter value exceeds a threshold; and
in response to the determination, performing a preventative operation.
2. The method of claim 1 , further comprising:
resetting the counter after the preventative operation is performed to a default value.
3. The method of claim 1 ,
wherein the block comprises data; and
wherein the updated counter value is a temperature modified retention time for the block.
4. The method of claim 3 ,
wherein the threshold is an integrity threshold; and
wherein the preventative operation is a garbage collection operation.
5. The method of claim 1 ,
wherein the block is an erased block; and
wherein the updated counter value is a temperature modified erase time for the block.
6. The method of claim 5 ,
wherein the threshold is an erase bake threshold; and
wherein the preventative operation is a re-erase operation.
7. The method of claim 1 , wherein the threshold is determined using a default temperature and the temperature reading is above or below the default temperature.
8. The method of claim 1 , wherein the temperature reading is a composition temperature reading derived from two or more separate temperature readings associated with the solid state memory module.
9. A storage module, comprising:
a storage module controller;
a plurality of solid state memory modules; and
a plurality of temperature sensors,
wherein the storage module controller is configured to:
obtain a composition temperature reading for a solid state memory module of the plurality of solid state memory modules based on plurality of temperature readings from the plurality of temperature sensors;
determine a counter increment value for a counter, wherein the counter is associated with a block in the solid state memory module and wherein the counter increment value is determined using the composite temperature reading;
update a counter value for the counter using the counter increment value to obtain an updated counter value;
make a determination that the updated counter value exceeds a threshold;
in response to the determination, perform a preventative operation; and
reset the counter after the preventative operation is performed.
10. The storage module of claim 9 ,
wherein the block comprises data; and
wherein the updated counter value is a temperature modified retention time for the block.
11. The storage module of claim 10 ,
wherein the threshold is an integrity threshold; and
wherein the preventative operation is a garbage collection operation.
12. The storage module of claim 9 ,
wherein the block is an erased block; and
wherein the updated counter value is a temperature modified erase time for the block.
13. The storage module of claim 12 ,
wherein the threshold is an erase bake threshold; and
wherein the preventative operation is a re-erase operation.
14. The storage module of claim 9 , wherein the threshold is determined using a default temperature and the composite temperature reading is above or below the default temperature.
15. A non-transitory computer readable medium comprising computer readable program code to:
obtain a temperature reading for a solid state memory module;
determine a counter increment value for a counter, wherein the counter is associated with a block in the solid state memory module and wherein the counter increment value is determined using the temperature reading;
update a counter value for the counter using the counter increment value to obtain an updated counter value;
make a determination that the updated counter value exceeds a threshold, wherein the threshold is determined using an default temperature and the temperature reading is above the default temperature; and
in response to the determination, perform a preventative operation.
16. The non-transitory computer readable medium of claim 15 , wherein the computer readable program code further:
resets the counter after the preventative operation is performed.
17. The non-transitory computer readable medium of claim 15 ,
wherein the block comprises data; and
wherein the updated counter value is a temperature modified retention time for the block.
18. The non-transitory computer readable medium of claim 17 ,
wherein the threshold is an integrity threshold; and
wherein the preventative operation is a garbage collection operation.
19. The non-transitory computer readable medium of claim 15 ,
wherein the block is an erased block; and
wherein the updated counter value is a temperature modified erase time for the block.
20. The non-transitory computer readable medium of claim 19 ,
wherein the threshold is an erase bake threshold; and
wherein the preventative operation is a re-erase operation.