Replacing An Iom; Removing A Controller Module - Dell EMC ME4 Series Owner's Manual

NOTE:
In a dual-controller system in which PFU is enabled, when you update the firmware on one controller, the system automatically
updates the partner controller.
Verifying component operation
Controller module
After replacing the controller module, verify that the CRU OK LED (rear panel) illuminates green, indicating that the controller has
completed initializing, and is online/operating normally. It may take two to five minutes for the replacement controller to become ready. If
you are replacing either controller module, and PFU is enabled, you may need to wait 30 minutes to ensure that the two controllers—with
their respective ownership of the disk groups—have enough time to fully stabilize.
NOTE: Use the ME Storage Manageror CLI to perform a restart
Dell EMC ME4 Series Storage System Administrator's Guide for more information.
the
Expansion module
If the storage system is configured with expansion enclosures, the replacement expansion module may take up to one minute to initialize
after the cables are connected. Verify that firmware on both expansion modules is compatible and current.
NOTE: See the topic about updating expansion module firmware within the
Administrator's Guide .

Replacing an IOM

Removing a controller module

NOTE: Considerations for removing controller modules:
• In a dual-controller environment, you may hot-swap a single controller module in an operational enclosure, provided you first shut
down the faulty controller using the ME Storage Manager or the CLI.
• In a dual-controller environment—if replacing both controller modules—you must adhere to the instructions provided in
begin.
• Do not remove a faulty module unless its replacement is on-hand. All modules must be in place when the system is in operation.
Before you begin any of the procedures, see the
Illustrations in the controller module replacement procedures show rear panel views of the enclosure, and IOMs are properly aligned for
insertion into the IOM slots.
1 Verify that you have successfully shut down the controller module using the ME Storage Manager or the CLI.
2 Locate the enclosure whose UID LED (Ops panel on enclosure left front ear) is illuminated, and within the enclosure, locate the
controller module whose OK to Remove LED is blue (rear panel).
3 Disconnect any cables connected to the IOM.
Label each cable to facilitate re-connection to the replacement IOM.
4 Grasp the module latch between the thumb and forefinger, and squeeze the flange and handle together to release the latch handle
from its docking member (detail No.1), and swing the latch out to release the IOM from its seated position (detail No.2) as shown in
the following figures.
only if necessary. See the topic about restarting controllers in
ESD precautions.
Dell EMC ME4 Series Storage System
Module removal and replacement
Before you
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