Read The Fine Manual at
http://www.docs.hp.com/hpux/onlinedocs/1615/rp7400_customer/index.html
under High Availability Requirements page 53
for a discussion complete with pictures for how to power your 240v PDU's across
3 branch circuits. Any one circuit can blow and the box keeps running.
Paul Courry
> I've had a similar question. The N-Class requires 2 power supplies to run.
> If in your case PDU one goes out, your system dies. Should the N-Class be
> set up on 3 separate PDU's? Each with their own UPS and power?
>
> David Knispel
> [log in to unmask]
> Phone: 513-248-5029
> Fax: 513-248-2672
>
>
>
> -----Original Message-----
> From: HP-3000 Systems Discussion [mailto:[log in to unmask]]On
> Behalf Of John MacLerran
> Sent: Thursday, September 19, 2002 5:05 PM
> To: [log in to unmask]
> Subject: [HP3000-L] N-Class Power Supply question
>
>
> Dear HP3000-l
>
> We have an N-Class e-3000 (with 3 power supplies) configured as follows:
> Power supply 1 & 3 are on one PDU that goes to a UPS, and
> Power supply 2 is on the second PDU that goes to a second UPS.
>
> We also have an N-Class 9000 box configured similarly. The 9000 box
> needs all 3 power supplies to boot, but if one of the power supplies
> fails, the system can continue to run on the other two.
>
> Now for the question: Since both of the boxes in question are the same
> hardware -- N-Class with 3 power supplies, do they both function the
> same if one of the power supplies fails? If one of the power supplies in
> the e-3000 fails, can it continue to run with the other two, or will it
> crash?
>
> The reason I'm asking is that in October, we're scheduled to do a QA
> test of some of our UPS's, and it could lead to a situation where the
> e-3000 will lose power on one of the power supplies for a period of time
> (20 minutes or so, while the UPS is rated), and we want to know if this
> is going to present a problem to our 3000.
>
> Thanks!
> ----------------------------------------------------------------------
> John MacLerran
> IT Systems Analyst email: [log in to unmask]
> Idaho State University V(208) 282-2954
> http://www.isu.edu/~macljohn F(208) 282-3673
> ----------------------------------------------------------------------
>
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