We moved about 150 servers from one data center to another last year. They 
had been running continuously for 1 - 4 years (depending on the server). 
We had no problems like the ones mentioned in the article. Perhaps the 
conditions under which they are running for the length of time are 
different (temperature, humidity, etc...) and that could have caused the 
quicker evaporation of the electrolyte that was mentioned? I don't have 
any idea, but we didn't see this problem. We did have a number of disks 
die in the month or two after the move, which was an annoyance.

Jeff






"Angus Scott-Fleming" <[EMAIL PROTECTED]> 
01/26/2008 01:50 AM
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Subject
GibbsBlog: Death by Old PSUs






Has anyone here undergone something like this?

------- Included Stuff Follows -------
Death by Old PSUs
  Submitted by Mark Gibbs on Fri, 01/25/2008 - 3:01pm.

    I just read a mail list posting in which a friend explained how he had 
to 
    shut down and number of servers in a data center for facilities 
    maintenance for the first time in six years -- the machines had all 
been 
    running non-stop for the whole time. On restart a significant number 
    failed because -- it is suspected -- the power supplies which could 
supply 
    power for normal operation could no longer handle startup conditions! 
The 
    suspicion is that electrolyte evaporation in the PSU capacitors is the 

    most likely cause!

    Wow. Is there a disaster waiting to happen in your data center? I did 
a 
    quick search on this topic but not being an electrical engineer I may 
not 
    have been using the right search terms. Anyone know anything about 
this 
    problem?
--------- Included Stuff Ends ---------
http://www.networkworld.com/community/node/24346

Oh, and Happy Friday!  May all your servers stay up all weekend ...

Angus


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