A lever of a connector assembly is in the form of a single plate, and a resilient lock for locking the lever at a connection completing position and a finger placing portion used to rotate the lever are adjacent to each other at one end of the lever. In one aspect, an apparatus comprises a first layer for receiving one or more packets from one or more data flows and for generating one or more first layer Protocol Data Units from the one or more packets. The second optical amplifier receives the light amplified by the first optical amplifier, and amplifies the received light. If an unstructured file is to be operated in the context of a structured object store environment, a promotion operation is performed to update unstructured properties in the file with structured properties suitable for operation in the structured object store environment.