Patent ID: 9317211
Filing Date: 2016-04-19
CPC Classification: G06F

Claim Text:
1. A method for managing the life expectancy of at least one solid state drive (SSD) in a storage subsystem, comprising: initializing at least one cache device including the at least one SSD; determining a first rate of change representing a relationship between the rated life expectancy of the at least one SSD and the chronological lifespan of the at least one SSD; determining a first parameter associated with the remaining life of the at least one SSD; determining a second parameter associated with the power-on time of the at least one SSD; starting at least one timer to run for a predetermined interval, when the at least one timer expires, determining a third parameter associated with the remaining life of the at least one SSD, determining a fourth parameter associated with power-on time of the at least one SSD after initializing the at least one cache device, and restarting the at least one timer; determining a second rate of change representing a relationship between life expended by the at least one SSD after initializing the at least one cache device and power-on time of the at least one SSD after initializing the at least one cache device; determining a third rate of change representing a relationship between total life expended by the at least one SSD and total power-on time of the at least SSD; and when both the second rate of change and the third rate of change are greater than the first rate of change: