Re: OT: servers vs. lightning and power outages
On Mon, Mar 14, 2011 at 09:40:34PM -0500, Stan Hoeppner wrote:
> Jerome BENOIT put forth on 3/14/2011 7:58 PM:
>
> > Just curious:
> > why the UPS must be at the bottom ?
>
> Your attempt at being a smart ass aside, I'll answer your question. The
> answer, however, isn't the simple one you're expecting.
>
> I stated bottom of the server rack explicitly because some SAs install
> all of their UPS gear in a single dedicated rack, or two, or xx, and
> feed PDUs in their server racks, often ignorantly over loading their UPS
> output circuits in the process. And yes, these SAs will load a 42U rack
> bottom to top with UPS units. I had to do this on one occasion myself
> due to an ill conceived pre-existing equipment layout. Thankfully the 4
> Liebert 3000s I had to mount in the top of the UPS rack only weighed
> about 80 lbs apiece. The first one was tough, but the last 3 were
> relatively easy. Ego boost prize goes to the first OP to reply
> correctly explaining why this was the case.
You needed several hands to hold the first Liebert in place as
you screwed it into the rack. The next one could rest on top of
the first.
I note that Liebert does not offer a slide-in rail kit.
-dsr-
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