topic Re: AC redundancy + Dynamic Power Save Mode in BladeSystem - General

AC redundancy + Dynamic Power Save Mode

lzamudio — Tue, 13 Nov 2012 14:20:49 GMT

Hi all,

A few months ago, a C3000 had an event, one of the two AC lines had a failure and the C3000 decided to shut down a blade.

The configuration of the C3000 was "AC redundancy + Dynamic Power Save Mode", in this configuration maintains the enclosure 2 of the 6 power supplies off.

The question is: Is it possible that the power supply off, of the live circuit, does not have enough time to turn on and the Enclosure need to power off a machine to keep alive the rest of blades?

Thanks.

Re: AC redundancy + Dynamic Power Save Mode

Casper42 — Fri, 30 Nov 2012 08:26:50 GMT

I'm having a problem remembering. Is AC Redundant N+N or N+1?

If its N+N you need to make sure each N is on its own Circuit or panel.
Dynamic Power Saver should not be a factor because it only kicks in when it doesn't need all N power supplies on a particular side to power your enclosure optimally.

However if you lost a circuit and that circuit had power supplies from both sides of the N+N equation on it, then it would explain the brownout.

The proper wiring should be documented in the c3000 User Guide or maybe even QuickSpecs.