Note that our standard practice is to connect dual power supply servers to each UPS, so that likelihood of downtime is minimised (e.g. if a UPS fails, or is powered-down during routine maintenance). Equipment that cannot be configured with dual power supplies should be powered from a transfer switch in the rack.

From discussion on week of 2017/07/17 at Subaru, we agreed we need to explore current configuration and situation at Subaru including notification under Gen2 (e.g. Gen2 only receives signal from their own UPS), and we need to find Subaru-wide solution to notice power failure to instruments (OBCPs).
Also we agreed we need to find solution to notice status of power transfer switch (commercial or DG) to PFS/SpS, while PFS CB2F switches are offline, especially to notice whether 2nd power outage detected at PFS SpS UPS is DG drained out or second time of commercial power outage.