Redundant Power Supplies- Halt on failure

[MaLaCoiD]

Is there a method to trigger a graceful shutdown when FreeNAS loses power to a redundant power supply?

I've got a Supermicro SC825 2U Rackmount Server case which has redundant Power Supplies. I've got a UPS with no USB data connection to signal power loss. I'd like to plug one PS into the UPS while the other PS is connected to a different source. So when the power is cut, only the UPS-connected PS will be active and the server will initiate shutdown.

I imagine the chassis would give some syslog or set a value when power fails- the chassis makes an audible alarm. Then I'd need something to notice that event and take action.

 

[Ericloewe]

I'm sure this is doable and I'm confident it's convoluted as hell. You'd need to query the BMC.

Frankly, you're better off with an El-Cheapo UPS just for power monitoring. Hardly ideal, but workable.

I've got a UPS with no USB data connection to signal power loss

No RS-232 either?