Silicon Graphics TP9400 RAID Owner's Manual page 82

4: Controller Enclosure Component Replacement Procedures
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Caution: To prevent damage to the controller enclosure circuitry, read the following:
You can replace the fan/communications canister while the controller enclosure is in
operation if you complete the exchange within 15 minutes. This time limit applies
only to the total time that the fan/communications canister is out of the controller
enclosure, beginning when you remove the failed canister and ending when you
re-seat the new one. This does not include the time it takes you to do this entire
procedure (such as checking indicators).
4. Remove the failed fan/communications canister from the controller enclosure
(Figure 4-10).
Using a flat-blade screwdriver, loosen the three captive screws on the
fan/communications canister. Use the handle to pull the canister out of the slot a
few inches. Then, grasp the sides of the canister with both hands and remove it from
the controller enclosure.
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