Patent ID: 7743205
Filing Date: 2010-06-22
Classification: G06F

Abstract:
1. A data storage system for storing data for at least one host computer, the data storage system comprising: a set of multiple read/write drives; a set of multiple data storage media slots wherein each data storage media slot receives a removable tape cartridge or removable disk cartridge; at least one robot that moves a tape or disk cartridge between one of the data storage media slots and one of the read/write drives; at least one library controller coupled to the robot and the data storage drives; non-removable data storage, wherein the non-removable data storage includes hard disk data storage, semiconductor memory data storage, or both, and wherein the non-removable data storage has a current memory capacity; at least one library management unit coupled among the at least one host computer, the non-removable data storage, and the library controller, wherein the library management unit: