MANAGING STORAGE DEVICES HAVING A LIFETIME OF A FINITE NUMBER OF OPERATIONS

摘要

Disclosed is a method and system of managing a plurality of storage devices, the storage devices having a lifetime of a finite number of operations. An average number of storage devices reaching said lifetime of a finite number of operations per first unit time is calculated. For each one of the plurality of storage devices an estimated date when said finite number of operations will be reached is calculated. For each date, a variable is set associated with that date, the variable being related to the number of storage devices reaching said finite number of operations within a predetermined period of said date. For one or more variables associated with a date where the value of the variable is larger than the value calculated using the date and said average number of storage devices reaching said lifetime within the predetermined period of said first unit of time, an action is carried out to reduce the number of storage devices reaching said lifetime per first unit of time. That action may be to exchange storage devices allocated to different usage tiers so as to change the number of operations per second unit of time that will be executed by each one of the plurality of storage devices. That action may be to store more parity information on some storage drives and less parity information on other storage devices. That action may be to store more heavily used extents on some drives and less heavily used extents on other drives.