Silicon Graphics InfiniteStorage 4000 Series System Upgrade Manual page 102

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6. Disconnect the following cables from both controller canister that contains the
HIC you are replacing.
Host interface cables
—
Drive interface cables
—
Ethernet cables
—
If fiber-optic cables are present, you can lift the two release levers and partially
remove the controller canister. Opening these release levers makes it easier to
press down on the fiber-optic cable release tab.
7. Remove both controller canisters from the controller-drive tray as shown in the
following figure.
a. Unlock and pull out the release levers to release the controller canisters.
b. Using the release levers and your hands, pull both controller canisters out of
the controller-drive tray.
c. Set each controller canister on a flat, static-free surface near the
controller-drive tray. Position the controller canister so that you can access
the top cover.
NOTE The following figure shows controller A being removed. You remove
controller B in the same way.