If your storage array has… You must…
Two controllers (duplex) 1. Take the controller offline.
2. Remove the controller canister.
3. Replace the battery.
4. Replace the controller canister.
5. Bring the controller online.
One controller (simplex) 1. Stop host I/O operations.
2. Power down the controller shelf.
3. Remove the controller canister.
4. Replace the battery.
5. Replace the controller canister.
6. Apply power to the controller shelf.
Requirements for replacing a battery
If you plan to replace a failed battery, you must have:
• A replacement battery.
• An ESD wristband, or you have taken other antistatic precautions.
• 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.)
Prepare to replace E2800 battery
The steps to prepare for battery replacement depend on whether you have a duplex
configuration (two controllers) or a simplex configuration (one controller).
• For duplex configurations, see Place controller offline (duplex).
• For simplex configurations, see
Power down the controller shelf (simplex).
Before you begin
• Verify that no volumes are in use or that you have a multipath driver installed on all hosts using these
volumes.
• Review the
Requirements for E2800 battery replacement.
Place controller offline (duplex)
If you have a duplex configuration, you must place the affected controller offline so you can safely remove the
failed battery. The controller that you are not placing offline must be online (in the optimal state).
Perform this task only if your storage array has two controllers (duplex configuration).
Steps
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