This invention relates seed layers and a process of manufacturing seed layers for casting silicon suitable for use in solar cells or solar modules. The methods may include selecting at least one read voltage for a read operation based on information set at a portion of an address of the respective one of the multi-level cells, and determining multi-level data stored in the respective multi-level cell using the at least one selected read voltage. Traffic for at least one of the identified NXXs is routed to the end office through a second switch that is different than the first switch.