A compression engine for a cache memory subsystem has a pointer into cache tag memory and cache data memory and an interface coupled to the pointer and capable of being coupled to cache tag memory, and cache data memory. A coating that is hard and has a low frictional coefficient as much as possible is applied to an inner surface of the hole. The LCC device may therefore be inspected from different angles by selectively using light of the first and second frequencies. They were also suitable for preparing hybrid materials with high thermal stability and chemical resistance. A virtual domain ID associated with the virtual switch is assigned to the device.