(1) Attention LED
The figure shows an example controller canister; the host ports on your controller canister might
be different.
Requirements for replacing a failed controller
Before you replace a controller, you must have:
• A replacement controller canister with the same part number as the controller canister you are replacing.
• An ESD wristband, or you have taken other antistatic precautions.
• Labels to identify each cable that is connected to the controller canister.
• A #1 Phillips screwdriver.
• 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.)
Optionally, you can use the command line interface (CLI) to perform some of the procedures. If you do not
have access to the CLI, you can do one of the following:
◦ For SANtricity System Manager (version 11.60 and above) — Download the CLI package (zip file)
from System Manager. Go to Settings
› System › Add-ons › Command Line Interface. You can then
issue CLI commands from an operating system prompt, such as the DOS C: prompt.
◦ For SANtricity Storage Manager/Enterprise Management Window (EMW) — Follow the instructions
in the express guide to download and install the software. You can run CLI commands from the EMW
by selecting Tools
› Execute Script.
Duplex configuration requirements
For a controller shelf with two controllers (duplex configuration), you can replace a controller canister while
your storage array is powered on and performing host I/O operations, as long as the following conditions are
true:
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