The PowerVault TL4000 tape library offers expandable and affordable tape automation for organizations whose data-protection needs have outgrown autoloader technology or capacity. It's the product of choice for small, medium and large businesses that require an affordable, versatile, easy-to-use, automated midrange tape backup solution. The PowerVault TL4000 library has four cartridge magazines, two on each side for a total of 48 tape slots. The lower-left magazine has nine storage slots and houses the three-slot I/O Station.