Disclosed are methods and systems of managing a plurality of 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 a finite number of operations will be reached is calculated. For each date, a variable related to the number of storage devices reaching said finite number of operations within a predetermined period of said date is set. For one or more variables having a value larger than a 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.