access the system’s data. Perform a shut down before you remove a controller module from an enclosure, or before you power o its
enclosure for maintenance, repair, or a move.
Using the ME Storage Manager
1 Sign-in to the ME Storage Manager.
2 In the System panel in the banner, click Restart System.
The Controller Restart and Shut Down panel opens.
3 Select the Shut Down operation, which automatically selects the controller type Storage.
4 Select the controller module to shut down: A, B, or both.
5 Click OK. A conrmation panel appears.
6 ClickYes to continue; otherwise, click No. If you clicked Yes, a message describes shutdown activity.
NOTE:
• If an iSCSI port is connected to a Microsoft Windows host, the following event is recorded in the Windows event log: Initiator failed
to connect to the target.
• See the Dell EMC ME4 Series Storage System Administrator’s Guide for additional information.
Using the CLI
1 Log-in to the CLI.
2 In your dual-controller system, verify that the partner controller is online by running the command: show controllers
3 Shut down the failed controller—A or B—by running the command: shutdown a or shutdown b
The blue OK to Remove LED (back of enclosure) illuminates to indicate that the controller module can be safely removed.
4 Illuminate the white Identify LED of the enclosure that contains the controller module to remove by running the command: set led
enclosure 0 on
The Display LED on the Ops panel located on the enclosure left ear will be blinking green when theset led enclosure 0 on
command is invoked.
NOTE
: See the
Dell EMC ME4 Series Storage System CLI Guide
for additional information.
Verifying component failure
Select from the following methods to verify component failure:
• Use the ME Storage Managerto check the health icons/values of the system and its components to either ensure that everything is
okay, or to drill down to a problem component. The ME Storage Manager uses health icons to show OK, Degraded, Fault, or Unknown
status for the system and its components. If you discover a problem component, follow the actions in its Recommendation eld to
resolve the problem.
• As an alternative to using the ME Storage Manager, you can run the CLI show system command to view the health of the system and
its components. If any component has a problem, the system health will be Degraded, Fault, or Unknown. If you discover a problem
component, follow the actions in its Health Recommendations eld to resolve the problem.
• Monitor event notication — With event notication congured and enabled, use the ME Storage Manager to view the event log, or
run the CLI show events detail command to see details for events.
• Check Fault LED (back of enclosure on IOM face plate): Amber = Fault condition.
• Check that the OK LED (back of enclosure) is o.
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Module removal and replacement
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