Owners Manual

Replacing controller modules in a dual-controller module enclosure
Removing a controller module from an operational enclosure significantly changes air flow within the enclosure. Slot openings
must be populated by controller modules for the enclosure to cool properly. Leave the controller modules in the enclosure until
you are ready to install a replacement controller module.
When two controller modules are installed in an enclosure, the controller modules must be the same model type.
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.
Follow these guidelines when replacing one controller module in an operational enclosure:
1. Record the controller module settings before replacing the controller modules.
2. Remove the controller module from the enclosure.
3. Install the replacement controller module in the enclosure.
4. Wait 30 minutes, then use the PowerVault Manager or CLI to check the system status and event logs to verify that the
system is stable.
NOTE: If the Partner Firmware Update (PFU) feature is not enable, update the firmware on the replacement controller
module.
Follow these guidelines when replacing both controller modules in an operational enclosure:
1. Record the controller module settings before replacing the controller modules.
2. Remove one controller module from the enclosure.
3. Install the replacement controller module in the enclosure.
4. Wait 30 minutes, then use the PowerVault Manager or CLI to check the system status and event logs to verify that the
system is stable.
NOTE:
If the Partner Firmware Update (PFU) feature is not enable, update the firmware on the replacement controller
module. For more information updating the firmware, see the Dell EMC PowerVault ME4 Series Storage System
Administrator's Guide.
5. Remove the second controller module from the enclosure.
6. Install the replacement controller module in the enclosure.
7. Wait 30 minutes, then use the PowerVault Manager or CLI to check the system status and event logs to verify that the
system is stable.
NOTE:
If the Partner Firmware Update (PFU) feature is not enable, update the firmware on the replacement controller
module. For more information updating the firmware, see the Dell EMC PowerVault ME4 Series Storage System
Administrator's Guide.
Removing a controller module from a dual-controller module enclosure
Perform the following steps to remove a controller module from a dual-controller module enclosure:
Before you begin any procedure, see ESD precautions on page 43.
NOTE:
● You may hot-swap a single controller module in an operational enclosure, provided you first shut down the controller
module using the PowerVault Manager or the CLI.
● Do not remove a faulty controller module unless its replacement is on-hand. All controller modules must be in place when
the system is in operation.
1. Verify that you have successfully shut down the controller module using the PowerVault Manager or the CLI.
2. Locate the enclosure with a UID LED that is illuminated.
3. Within the enclosure, locate the controller module with an OK to Remove LED that is blue.
4. Disconnect any cables connected to the controller module.
Label each cable to facilitate re-connection to the replacement controller module.
5. Grasp the module latch between the thumb and forefinger, and squeeze the flange and handle together to release the latch
handle, and swing the latch handle out to release the controller module from its seated position.
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Module removal and replacement