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# 2N, 1+1, N+1 power redundancy

Contributor

## 2N, 1+1, N+1 power redundancy

I don't understand about 2N, 1+1, N+1 power redundancy. what does if mean? how are they different?

Please, tell me
3 REPLIES 3
Acclaimed Contributor

## Re: 2N, 1+1, N+1 power redundancy

Hi,

in hp documentations you will often find "N+1", this means, you have 1 more than needed (fans, power supplies).

Hope this helps!
Regards
Torsten.

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Honored Contributor

## Re: 2N, 1+1, N+1 power redundancy

Hi,

2N -> you will have 2 times of minimum power supplies needed, for example, minimum power supply is 2, then you will have 4 power supply

N+1 -> you will have only 1 extra power supply from minimum needed, for examples minimum power supply is 2, then you will have 3 power supply

1+1 = 2 :) never heard this one

Regards,
Sandy
I never think of the future. It comes soon enough.
Honored Contributor

## Re: 2N, 1+1, N+1 power redundancy

Hi,

The web link explained in more detail.

http://www.industrialcontroldesignline.com/howto/showArticle.jhtml?articleId=199500416&pgno=3

Regards,
Asif Sharif
Regards,
Asif Sharif