Thin Provisioning as discussed in Storage Switzerland’s recent article on Thin Provisioning Basics, is the ability to define volume sizes in advance but to only allocate that capacity dynamically. Doing so reduces the up front storage requirements of an application and can dramatically reduce the amount of storage that needs to be purchased. An aspect of the subject that is glossed over is converting from fat volumes to thin provisioning. How can the old volumes be converted to take advantage of the new thin provisioning technology?