IBM BladeCenter JS20, Руководство по техническому обслуживанию и устранению неисправностей

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2. BladeCenter JS20 models that are designed for the NEBS environment contain
a power-management capability that provides the maximum possible operating
time for your system. Power management is invoked only when the blade server
is installed in a BladeCenter T unit and only under the short term extended
thermal conditions that are described in the preceding table as "short term" in
the high end of the NEBS extended temperature range, 40° to 55°C (104° to
131°F). Instead of shutting down or failing in short term extended thermal
conditions, the JS20 blade server automatically reduces the frequency of the
processor to maintain acceptable thermal levels. The processor frequency
automatically returns to normal as thermal conditions improve. The BladeCenter
management module is notified when power management starts and again
when it stops.
The following entries are made in the event log:
v Frequency throttling process is now active.
(This message indicates that power reduction is in effect.)
v Frequency throttling process is now idling.
(This message indicates that power reduction was previously invoked but is
no longer in effect.)
Do not restart the blade server when power reduction is in effect.
3. Some applications are sensitive to processor frequency changes. Check with
your application vendors to determine if there are any possible impacts to your
applications from the effects of the JS20 blade server power-management
capability in the short term extended thermal conditions of the NEBS
environment.
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BladeCenter JS20 Type 8842: Hardware Maintenance Manual and Troubleshooting Guide