Re: HMC Question -- MIDRANGE-L

We will probably just put our existing UPS's on top of the rack to power the xSeries and keep it simple.

Um, UPSs on TOP of a 7 ft rack? That sounds slightly dangerous to me but it's not my computer room!!

One other thing, don't plug one UPS into another UPS. This is easy to do when you have several small ones but is very bad for the UPS that's getting doubled up on! One of our customers had this setup and wondered why 'that big AS/400 UPS never EVER lasts as long as all the ones for the NT and other servers. What gives?' You can guess why..... Also each UPS needs it's own circuit from the panel. Them darn things draw a BUNCHFULL more power after an outage (to charge the batteries while still carrying the load) and of course that's when you'd trip the breakers when there is more than one on a circuit (and coincidentally when you need it most!)

- L

Mark
midrange-l-bounces@xxxxxxxxxxxx wrote on 08/18/2004 04:45:20 PM:
Mark,
 It's actually:
Wall - > UPS - > PDU - > All your stuff. Optionally you can also plug some of your stuff directly into the UPS if you'd like.

As for capacity you need to 'do the math' again and total up all the
requirements of the servers, HMC, etc to find out if it's got enough juice. Plan B is to plug it all in and see if the magic smoke comes out. I don't think that would make Cole happy though!!
  - Larry
Mark Phippard wrote:

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