• The second controller canister in the shelf has Optimal status.
• The OK to remove field in the Details area of the Recovery Guru in SANtricity System Manager displays
Yes, indicating that it is safe to remove this component.
Replace controller in duplex configuration
You can replace a controller canister in a duplex (two-controller) configuration, for the
following controller shelves:
• E5724 controller shelf
• E5760 controller shelf
About this task
Each controller canister contains a controller card, a battery, and an optional host interface card (HIC). When
you replace a controller canister, you must remove the battery and HIC, if one is installed, from the original
controller canister, and then install them in the replacement controller canister.
This task is only for storage arrays with two controllers (duplex configuration).
What you’ll need
• A replacement controller canister with the same part number as the controller canister you are replacing.
(See step 1 to verify the part number.)
• An ESD wristband, or you have taken other antistatic precautions.
• #1 Phillips screwdriver.
• Labels to identify each cable that is connected to the controller canister.
• A management station with a browser that can access SANtricity System Manager for the controller. (To
open the System Manager interface, point the browser to the controller’s domain name or IP address.)
Step 1: Prepare to replace controller (duplex)
Prepare to replace a controller canister by verifying that the replacement controller canister has the correct
FRU part number, backing up the configuration, and collecting support data. If the controller is still online, you
must take it offline.
Steps
1. Unpack the new controller canister, and set it on a flat, static-free surface.
Save the packing materials to use when shipping the failed controller canister.
2. Locate the MAC address and FRU part number labels on the back of the controller canister.
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