Owners Manual

Shutting down attached hosts

To replace modules in a 2U controller enclosure that has one controller module, you must shut down all of the attached hosts

before shutting down the controller module.

To replace the sideplane in a 5U84 enclosure, you must shut down all of the attached hosts before shutting down the controller

modules.

CAUTION: The sideplanes on the enclosure drawers are not hot swappable or customer serviceable.

Shutting down a controller module

Shutting down the controller module in an enclosure ensures that a proper failover sequence is used, which includes stopping all

I/O operations and writing any data in write cache to disk. Perform a shut down before you remove a controller module from an

enclosure, or before you power off an enclosure for maintenance, repair, or a move.

Using the PowerVault Manager

1. Sign-in to the PowerVault 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 confirmation 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 PowerVault 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 PowerVault ME4 Series Storage System CLI Guide for additional information.

Verifying component failure

Select from the following methods to verify component failure:

● Use the PowerVault 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 PowerVault 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 field to resolve the problem.

Module removal and replacement