Removing a controller module
Procedure
1. (Optional) If you choose to perform the replacement offline, first shut down the failed controller using
the Recovery/Power button. Then, shut down the other controller.
2. Unplug all cables from the controller module.
a. Do not unplug the power cables if performing a hot or warm swap.
b. If SAS cables are being used to connect enclosures and you must disconnect from the affected
enclosure, be sure that you do not remove both SAS cables at the same time. At least one SAS
cable must be connected to the component to ensure access continues to the drives in the
enclosure.
3. Loosen the captive retaining thumbscrew (1) and swing out the controller module handle (2).
4. Pull the controller module (3) out of the enclosure using the controller module handle.
More information
Recovery/power button on page 12
Installing a controller module
Prerequisites
• Remove the battery from the failed controller. Batteries are not supplied with a replacement controller.
• Install the battery on the replacement controller, following the steps in Replacing the cache backup
battery.
92 Removing a controller module
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