N+1 mode with 2 power supplies?

Unanswered Question
Sep 8th, 2010

Hi,

Can I configure N+1 mode in UCSM with just 2 power supply?

Can UCSM take this configuration or will it return an error?

Thanks

I have this problem too.
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Robert Burns Wed, 09/08/2010 - 16:50

Steven,

It's depends on the amount of blades in the system and load they're using.  N+1 means the mininum # of power supplies plus one extra (standby).  If a single power supply is enough juice to power your blades, then yes.  Otherwise you may need to configure non-redundant.  When you try to configure this on UCSM the system will notify you if your Power Scheme is not sufficient to provide N+1.  In this case it will just operate in non-redundant (combined) mode.

We don't normally see N+1 with anything less than 3 power supplies (as the entire system can run off 2 at full capacity).

Robert

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