If you can swing it, the ideal situation would be to have two UPS powering the computer room. Each
one covering half the circuits; then have any equipment with dual (or more) power supplies plugged
into separate circuits each protected by a different UPS.

If nothing else, assuming your i5 has redundant power supplies (it supports it, do you have them
installed?) you could consider having the i5 plugged into the a circuit the computer room UPS
protects, in addition to a circuit not protected by the computer room UPS which would them be
protected by the current UPS.

Charles Wilt
Software Engineer
CINTAS Corporation - IT 92B


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-
bounces@xxxxxxxxxxxx] On Behalf Of Burns, Bryan
Sent: Wednesday, March 05, 2008 12:42 PM
To: MIDRANGE-L@xxxxxxxxxxxx
Subject: Should we put the system i on a UPS for the entire room?

Our network people are getting a quote on putting the server room on one
UPS which will feed the entire circuit going into the server room. This
includes our IBM 520 which is currently connected to a Powerware 5125 UPS
still under warranty. The room will not have a generator. From the
iSeries side of things, I don't see any advantage to going to a UPS that
will protect 20 other servers.

What precautions do the network guys need to take with respect to the IBM
520? That is, are there any unique UPS requirements for a 520 server
versus, let's say a Dell server?

Thanks in advance.

Bryan Burns
iSeries Specialist
IBM Certified Specialist - iSeries System Command Operations
M.I.S. Department
ECHO Outdoor Power Equipment

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