A filtration vessel has an inlet for inflow into the filtration vessel of liquid media to be filtered, a body of filter media in the filtration vessel, and a drain to receive filtered liquid media for take off from the filtration vessel. The method includes determining potential owners of the lock by inspecting a core file of a computer system or memory of a live system to determine which threads have pointers to the lock. In one embodiment, the process gas is utilized in both the first and second etching steps. In various embodiments, the counter provides a corrected position value that has an effective timing within a few fast clock cycles of the time of the latch trigger signal. The host generates reports regarding the SMDR calling data, the reports being accessible by a customer via a connection to a private customer network.