Abstract: The present invention is directed toward methods and systems for data de-duplication. More particularly, in various embodiments, the present invention provides systems and methods for data de-duplication that may utilize storage reclamation. In various embodiments, data de-duplication may be performed using data storage reclamation by reconciling a list of all active tags against a list of all tags present within the object store itself. Any tags found to be in the object store that have no corresponding active usage may then be deleted. In some embodiments additional steps may be taken to avoid race conditions in deleting tags that are needed by incoming data. In some embodiments the object store may request the lists. In other embodiments, a runtime list, in which each new tag is entered as they are returned from the object store. In another embodiment the object store may maintain this list directly.

Abstract: In accordance with some embodiments, of the systems and methods described here a data storage system that may include data de-duplication may receive a stream of data and parse the stream of data into a block at a local client node. Additionally, in some embodiments, a code that represents the block of data might be determined at the local client node. This code, representing the block of data, may be sent to a server. In accordance with various embodiments, the server may determine if a block is unique, for example, based on the code received at the server. In various embodiments, the server might write a unique block to a file at the local client node; and update metadata.

Abstract: Method and apparatus for analyzing a mass data storage device, such as for troubleshooting a cartridge tape drive device. In one embodiment, the method comprises: physically associating non-volatile memory with a removable media storage device, storing information in the non-volatile memory regarding characteristics of the removable media storage device, and providing the non-volatile memory and the removable media storage device for service. Information stored in the non-volatile memory is available for use by a service technician. This information includes at least a first data structure associated with a state of the removable media storage device before servicing and at least a second data structure associated with historical information regarding operation of the removable media storage device.

Abstract: The present invention provides a storage system having a programmable controller which recognizes the amount of storage capacity paid for by a customer, even if more physical capacity is actually installed. When the customer purchases additional capacity, the controller is directed to recognize the additional capacity and permit access thereto.