HP 234664-002 - ProLiant - ML330T02 Update Manual - Page 11

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HP 234664-002 - ProLiant - ML330T02 Update Manual
ISS Technology Update
Models with redundant fans
Several ProLiant DL and ML server models support fan sets that provide cooling redundancy. Redundant fans enable these
models to operate indefinitely in the event of a single fan failure. If a fan fails, the necessary logging and alerting actions still
occur and the other fans will increase in speed to maintain appropriate cooling for the entire system. The server models that
support redundant fans are listed in Table 5-1.
Table 5-1. ProLiant DL and ML server models that support redundant fans
ProLiant DL servers
DL360
DL365
DL380
DL385
DL580
DL585
NOTE:
The ML350 G1 through G5 servers have fan configuration offerings stated
as redundant; however, these have a non-redundant fansink for the CPU with
redundant (non-processor) cooling.
Failure behavior of models with redundant fans
ProLiant DL and ML servers with an operational health driver implement graceful shutdowns 60 seconds after it is determined
that appropriate cooling cannot be maintained. Graceful shutdowns are cancelled if the condition that triggered them is
corrected prior to the countdown completion. Beginning with G5 Intel processor-based systems and G2 AMD processor-based
systems, graceful shutdowns can occur without a health driver installed. The shutdown is handled by iLO in such a case. If
Insight Agents are installed and configured appropriately, they will send a message that describes the event and whether action
was taken to shutdown the system. Table 5-2 identifies several failure scenarios and the resulting system behavior.
Table 5-2. Failure behavior of ProLiant DL and ML servers with redundant fans
Scenario
Single fan fails during POST
Multiple fans fail during POST
Single fan fails; OS with health driver
(thermal shutdown enabled)
Multiple fans fail after POST
Single/Multiple fan(s) fail
(thermal shutdown disabled)
1
The Integrated Management Log (IML) is a feature of the ASM controller which keeps a rotating, first-in-first-out record of events in non-
volatile memory. The log can be accessed while the server is operational or through the Integrated Lights-Out user interface.
ProLiant ML servers
ML350
ML370
ML570
Behavior*
The error is logged in the Integrated Management Log (IML
The health LED turns to amber.
The system continues to run OK.
The error is logged in the IML.
The system boots to the point that the ROM checks the fan configuration.
ROM will terminate POST and restart the server.
The error is logged in the IML by iLO.
The error is logged to the OS logs by the health driver if it is installed.
The health LED turns to amber.
The system continues to run.
The error is logged in the IML by iLO.
The error is logged to the OS logs by the health driver if it is installed
The health driver initiates a graceful shutdown.
The error is logged in the IML by iLO.
The error is logged to the OS logs by the health driver if it is installed.
The system continues to run until thermal sensors reach the hardware protection limit, at
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