Method and apparatus for sputter depositing silver selenide and controlling defect formation in and on a sputter deposited silver selenide film are provided. Additionally, a method for optical layer management of an optical channel in an optical network includes extracting a frame header from an optical signal in the optical channel and analyzing the optical signal for the presence of previously inserted specific data patterns, the specific data patterns being indicative of respective line statuses of the optical channel. The guide part is provided with a holding device to hold a cut end portion-side of the wire cut and separated in conjunction with a cutting operation of the moveable blade. By including a cache memory inside the loadstore unit, the processor is directly interfaced from its loadstore units to the caches. The performance and hypervisor processors simultaneously execute tasks that require combined processing power of all processors.