In one example, a network device includes a plurality of interface cards to send and receive packets over a network, a primary control unit of the network device, and a secondary control unit of the network device configured to detect a failover event that causes the network device to failover from the primary control unit to the secondary control unit. A patient exercise episode is identified using at least one predetermined criteria. A method of manufacturing of the nanostructured working electrode and an electrochemical sensor containing the nanostructured electrode is disclosed. Requests to the first set of data are allowed to proceed after the at least one space is allocated in the second cache and before the data in the backup cache is copied to the at least one allocated space in the second cache. The guide portion has a curved surface guiding the cable thereabout. The biasing member is mounted around the annular shank and has two ends abutting respectively with the handle and the collar.