Leverage the investment in your MSL library, now or in the future, to increase both capacity and performance as data needs change. The HP StorageWorks MSL Library Extender Kit can be used to connect two MSL libraries to create one larger, logical library. The stacked libraries appear to the host as a single library. The extender kit is customer installable in less than 60 minutes.The library extender occupies the lowest half-height drive bay in the top library and the upper half-height drive bay of the lower library. No additional external power or communication cabling is necessary. The upper Library controls the extended library. Any drive in the extended library may host the library interface. Only the operator control panel (OCP), USB port, and Ethernet connection of the upper library are used in the extended mode.