Controller Fan Canister - Silicon Graphics TP9400 RAID Owner's Manual

Controller Fan Canister

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You can hot swap the battery canister, replacing it while the controller enclosure is in
operation, however, use the TPSSM7 storage management software to make sure that
there is no data in cache and that all caching is stopped before you remove a battery
canister. Data in cache is unprotected if a power outage occurs while the battery canister
is out of operation.
If a battery fails, the fault indicator on the battery canister will glow. For more
information about indicators, see "Checking the Controller Enclosure Indicator Lights"
on page 36.
If you replace the battery canister and continue to experience battery problems (such as
a loss of battery power to the controllers or batteries not charging properly), the
controller enclosure may have defective components or connections. Check the storage
management software (TPSSM7) for indications of other component failures.
The controller fan canister is a single, removable unit containing two cooling fans and
temperature monitoring logic. The controller fan plugs directly into a slot on the front of
the controller enclosure, to the left of the controllers (Figure 2-8). The fan has a lever and
a handle for easy removal. Five indicators provide overall system status information
(Figure 4-8 on page 60). The dual fans in the fan canister provide a redundant cooling
system to both controller canisters. If one fan fails, the other will continue to operate,
providing sufficient air circulation to prevent the controllers from overheating until you
can replace the entire controller fan canister.
Controller Enclosure Components
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