IBM TotalStorage DS4500, User Manual

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Figure 39 shows the DS4500 Storage Server air flow. Make sure your installation
site allows adequate ventilation to the DS4500 Storage Server during operation.
Note: Allow at least 60 cm (2 ft) of clearance in front of and behind the DS4500
Storage Server for proper ventilation.
Servicing notes
Consider the following factors when you service the storage server fan:
v The storage server fan and the fan and communications module cooling system
failing simultaneously in the storage server is unlikely. Such a failure will cause
either one or both controllers to overheat. Under these circumstances, the amber
controller light on the front panel might be lit. If this occurs, shut down the
DS4500 Storage Server immediately and let the unit cool to room temperature
and then replace the storage server fan.
v You can hot swap, or replace, the storage server fan, as long as you complete
the exchange within 15 minutes. The time limit applies to the total time that the
fan is out of the chassis. The time begins when you remove the failed storage
server fan and ends when you install the new one. This does not include the time
it takes to perform the entire procedure (for example, checking the indicator
lights).
v When a storage server fan fails, the fault light on the storage server fan is lit. For
more information about indicator lights, see “Storage server indicator lights” on
page 26.
v If you replace the storage server fan and still experience problems, the DS4500
Storage Server might have defective components or connections. Check the
storage-management software for indications of other component failures.
v The storage server fan indicator light is also used to indicate a fan and
communications module failure. Be sure to check the storage server fan and fan
and communications module before you call for service.
Figure 39. DS4500 Storage Server airflow
Chapter 3. Replacing the DS4500 Storage Server components
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