[THIN] Re: UPS question
- From: bbeckett2000@xxxxxxxxxxx
- To: thin@xxxxxxxxxxxxx
- Date: Fri, 13 May 2005 13:32:28 +0000
I've spoken with an APC rep before and I received similar feedback. Basically
he told me, the best way to utilize a UPS is to plug each server/device
directly into the unit, bottom line. He also said that devices plugged into a
power strip and that power strip being plugged into the UPS would not give an
accurate indication on load of the UPS.
-------------- Original message --------------
> Here is an offbeat type question - what do you think?
>
> I have seen many server racks where a larger UPS such as an APC 3OOO gets
> racked at bottom and rack has an inbuilt power bar/strip into which all the
> servers get plugged. So the power bar is the only one which directly plugs
> into
> the UPS.
>
> In my opinion this is not ideal but please educate me if I am wrong. My
> reasons/assumptions are as follows:
> 1) The one resceptacle used on the UPS can't possibly supply more than 3O
> amps
> of power at any one time so if you have 5 or 6 servers drawing maximum power
> at
> the same time via the power strip they must share the 3O amp power stream -
> if
> each plugged into the UPS directly they would each have direct access to 3O
> amps
> if ever required. 6 servers all drawing maximum power at same time does not
> seem
> good. I have seen this set up in past and swear I could hear servers
> ?squealing?
> under the stress.
> 2) If the power bar/ strip ever gets accidentally shut off or malfunctions
> you
> just lost all redundancy you would have had if the servers were all plugged
> directly into the UPS.
> 3)When I questioned APC a few years ago they said that any server that plugs
> into any kind of power bar/strip which in turn is plugged into their UPS
> would
> lose the 15Ok warranty from APC on any damaged equipment as they do not
> guarantee anything unless directly plugged into the UPS.
> The reasons given by the Tech rep were along same reasoning given above in 1)
> or
> 2). I agree with this but other IT employees at my company do not see what I
> would take to be common sense. However maybe the more advanced power strips
> can
> pull more power from the UPS though I don't see how this is possible if each
> APC
> resceptacle is rated for 30 amps max.
> ÿÿÿÿÿÿÿÿÿÿÿÿÿÿN¬ýg??¦?ì¢N§>¸§¿ñ¦l6?jö¢?¦å?{z»"¢¦¸§¿ñ'?)Þÿÿ?ô?/÷
> §r¼©¶*'ÿjwqêí?ø?j×?©Ú?é???ÛiÿÿðÃ?)é®)íýÊ&ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿRÇ?º?)
> X??¢jn¶)àü¸§?½¨¥i¹^ý«?Ûiÿÿí?)?ë?)ä¿÷
> ?N§Z)"ýÊ&?éâ·üL\zY^?yªÜ?ð?¥¦â?+bz?ÛiÿÿðÃ?)ð?Hr?ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ?·!?÷
> ¬ÿûhýIì¹» ®&Þÿô®nÇ+?·¢±ë( ²¯õZq«b¢¡×ºÇ¶méhÏùb??Ûiÿÿí?)?ër+k?b²~
Other related posts:
