Silicon Graphics InfiniteStorage 4000 Series System Upgrade Manual page 96

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Figure 60 Removing a Controller Canister
8. Set the controller canister on a flat, static-free surface with the release levers up.
ATTENTION Possible equipment damage – The controller slot cannot remain open
for more than three minutes because of the possibility of overheating the equipment.
The controller air blocker fills the controller slot so that the equipment will not
overheat.
9. Prepare the controller air blocker by removing it from its packaging and folding it
inward at right angles so it is ready to insert into the open controller slot.
1. Release Levers
2. Controller Canister