Lenovo Storage E1024 (English) CRU Installation and Replacement Guide - Lenovo - Page 23

Replacing a controller module or expansion module In a dual-controller configuration, controller and expansion modules are hot-swappable, which means you can replace one module without halting I/O to disk groups, or powering off the enclosure. In this case, the second module takes over operation of the storage system until you install the new module. You may need to replace a controller module or an expansion module when: • The Fault/Service Required LED is illuminated • Health status reporting in the SMC indicates a problem with the module • Events in the SMC indicate a problem with the module • Troubleshooting indicates a problem with the module Before you begin Removing a controller or expansion module from an operational enclosure significantly changes air flow within the enclosure. Openings must be populated for the enclosure to cool properly. Leave modules in the enclosure until ready to install a replacement. For controller enclosures configured with a single controller module, a companion IOM blank must be properly installed in the bottom controller module slot. Single-controller enclosures can be upgraded to dual-controller status. If replacing the controller module in a single-controller enclosure, or if replacing both controllers in a dual-control enclosure, use the SMC to record configuration settings before installing the new controller modules. See Removing a controller module or expansion module on page 26, and Installing a controller module or expansion module on page 28 for instructions on installing an additional controller module. CAUTION: When replacing a controller module, ensure that less than 10 seconds elapse between inserting it into a slot and fully latching it in place. Not doing so might cause the controller to fail. If it is not latched within 10 seconds, remove the controller module from the slot, and repeat the process. When two controller modules are installed in the enclosure, they must be of the same model type. When replacing both controller modules in an operational enclosure, follow these guidelines: 1. Replace one controller as described in these instructions. 2. Wait 30 minutes: this pause ensures that the controller and its ownership of disk groups has sufficient time to stabilize (also see Verifying component operation on page 28). 3. Check the system status and event logs to verify that the system is stable. 4. Replace the partner controller as described in these instructions. Configuring partner firmware update In a dual-controller system in which Partner Firmware Update (PFU) is enabled, when you update firmware on one controller, the system automatically updates the partner controller. Disable partner firmware update only if requested by a service technician. Use the SMC or the CLI to change the PFU setting. Using the SMC IMPORTANT: See the "Updating firmware" topic within the Lenovo Storage Manager Guide before performing a firmware update. To change the PFU setting using the SMC: 1. Sign-in to the SMC. 2. Click in the System panel in the banner, and select Action > Update Firmware. The Update Firmware panel opens. The Update Controller Modules tab shows versions of firmware components that are currently installed in each controller. Lenovo Storage CRU Installation and Replacement Guide 23