RE: AS400 lost power

["Jones, John (US)" <John.Jones@xxxxxxxxxx>]

1. Bad setup - cabling or other.  Beyond the CEC-UPS cabling, does the
400 have any additional frames and if so how are they cabled to the UPS?
2. Overloaded UPS that could handle the load passing through while on AC
but couldn't handle the load on DC.
3. The average Windows server with, say, 4 disks spinning probably burns
250-400 watts; the AS/400 probably consumes 3+ times that if it's a
small-mid sized model, more if it's a big box with multiple frames.
4. UPS monitoring software - Maybe the Windows boxes ran for a bit on
battery and stayed up until util power was restored & they got the
all-clear signal (back on utility power) from the UPS.  If the 400 isn't
monitoring the UPS for such a signal, it may have forced a powerdown.


John A. Jones, CISSP
Americas Information Security Officer
Jones Lang LaSalle, Inc.
V: +1-630-455-2787  F: +1-312-601-1782
john.jones@xxxxxxxxxx

-----Original Message-----
From: Jerry [mailto:jdraper@xxxxxxxxxxxxx] 
Sent: Wednesday, February 16, 2005 11:56 AM
To: Midrange Systems Technical Discussion
Subject: AS400 lost power


Why, why, why.....

Our data center lost power and the AS400 went down hard but the file
servers in the same room stayed up.  The room is on a UPS but the
batteries were so weak that it didn't really matter.  

Why would this happen?

(BTW, batteries are now replaced and UPS works).

TIA,


Jerry
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