Change Master CM

Overview

This function switches the Master CM. The Master CM is the Controller Module with the currently enabled LAN port used for device management.

Caution

  • This function can only be used when a Web GUI is connected to a slave CM.

  • Log in again from Web GUI after switching the Master CM.

Note

  • When multiple controllers are present, the CM with access privileges to manage the storage system is called the Master CM. All others are called Slave CMs. When an error occurs in a CM or a LAN, the Master CM is automatically switched, and the IP address of the old Master CM is passed to the new Master CM. By specifying the IP address of the Slave CM, the Master CM can be forcibly switched to the Slave CM when an error occurs and the Master CM cannot be connected.

  • Device configuration cannot be continued if the IP address to connect to the CM is changed. Logging in again with the new IP address is required.

User Privileges

Availability of Executions in the Default Role

Default role Availability of executions
Monitor  
Admin  
StorageAdmin  
AccountAdmin  
SecurityAdmin  
Maintainer

Refer to "User Roles and Policies" for details on the policies and roles.

Display Contents

This function switches the Master CM.

CM Information

Item Description

Current Master Controller Module

The current Muster CM is displayed.

For the ETERNUS DX900 S5 or the ETERNUS DX8900 S4

CE#x CM#y

For the other models

CM#y

x: CE number

y: CM number

Controller Module connected to GUI

The CM that is logged in with Web GUI (Slave CM) is displayed.

The displayed CM changes to the Master CM.

For the ETERNUS DX900 S5 or the ETERNUS DX8900 S4

CE#x CM#y

For the other models

CM#y

x: CE number

y: CM number

Operating Procedures

Switch the Master CM.

  1. Click [Change Master CM] in [Action].

  2. Click the [Change] button.

    → A confirmation screen appears.

  3. Click the [OK] button.

    → The Master CM is switched.

  4. Click the [Done] button to return to the [Utility] screen.

Caution

  • After the process is completed successfully, log in again using Web GUI.