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September 2002, Week 3

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Subject:
Re: N-Class Power Supply question
From:
Dave Knispel <[log in to unmask]>
Reply To:
Dave Knispel <[log in to unmask]>
Date:
Thu, 19 Sep 2002 18:11:26 -0400
Content-Type:
text/plain
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text/plain (55 lines) 
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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