This morning I ran a full IPMI sensor scan on all the realtime front ends and h1susauxex could only see one of its two redundant power supplies. I drove out to EX to inspect and found that both PS look fine with green LEDs. One at a time, I disconnected the power cord and pulled the PS out of the chassis, waited until the LED extinguished and then reinserted. This has made no change to the IPMI Sensor reporting. I'll flag this unit as an exception when reporting failed power supplies.

IPMI Sensor h1susauxex:

h1susauxex:   OK     | (2215) Chassis Intru     |                  OK                   |
h1susauxex:   OK     | (2818) PS2 Status        |           Presence detected           |
 

IPMI Sensor h1susauxey for comparison:

h1susauxey:   OK     | (2215) Chassis Intru     |                  OK                   |
h1susauxey:   OK     | (2751) PS1 Status        |           Presence detected           |
h1susauxey:   OK     | (2818) PS2 Status        |           Presence detected           |