VIRTUAL STORAGE MANAGER

COMPUTER HARDWARE; DATA STORAGE DEVICES, NAMELY MAGNETIC TAPE DRIVES, TAPE CARTRIDGES, TAPE LIBRARIES, TAPE STORAGE SUBSYSTEMS, COMPUTER DISK DRIVES, DISK ARRAY SUBSYSTEMS AND DISK BUFFERS; COMPUTER SOFTWARE USED IN CONNECTION WITH OPERATION OF DATA STORAGE DEVICES FOR DATA STORAGE, RETRIEVAL, COMPRESSION, DECOMPRESSION, ALLOCATION, ORGANIZATION, MOVEMENT AND MONITORING, AND MANUALS, PROVIDED AS A UNIT