Power supplies for AlphaServer DS25

From: marc thoelen (marc.thoelen_at_uhasselt.be)
Date: 10/13/05

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    Date: Thu, 13 Oct 2005 14:38:34 +0200
To: tru64-unix-managers@ornl.gov

    Dear all,

    We recently acquired a brand new AS DS25, with 2 power supplies (for
    redundancy reasons, we thought !).
    However we are now told that this machine needs both PS's in its
    'basic' (i.e. non-redundant) configuration. There is a possibility to
    install a 3rd PS, but this can only solve the problem of a failing PS
    (one of the other 2 then).
    What we typically want to do is hook up 1 PS to the standard power-net,
    and another PS to a UPS-protected net, allowing us more redundancy AND
    the possibility to dynamically shut off 1 of both power-nets without
    shutting down the machine...
    However this last scenario doesnt seem to be possible in this DS25.

    Strangely enough, we have a 7 year old DS25 that DOES this, i.e. it has
    2 PS, that can be connected to 2 different power-nets...

    Can anybody confirm these findings, and suggest any solutions ???

    Marc

    Marc Thoelen
    Netwerkmanager
    Universiteit Hasselt
    Agoralaan, Gebouw D
    3590 Diepenbeek

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