PowerVault ME5 : l’interface de gestion est inaccessible ou ne répond pas
6 octobre 2023Procedure:
Step 1. Attempt to restart management services on both controllers.
- This step may not be possible in all circumstances. Restarting the management controller does not impact production.
- This step terminates the management session and management access is restored after approximately 2 or 3 minutes when the services are restarted.
- If management services can be restarted successfully on both controller modules, go to Step 3: Upgrade controller module firmware to ME5.1.2.0.1 or later.
- Open an SSH session to each controllers’ management interface, and log in as a managing or administrator level user. Alternatively, an administrator can try with USB serial connection to each controller. Where it is not possible to log in using SSH or a serial connection, go to Step 2: Physically reseat one controller module or power off array.
- If the login is successful, restart the management controller on each using the following command:
restart mc full# restart mc full During the restart process you will briefly lose communication with the specified Management Controller(s). Do you want to continue? (y/n) y Info: Restarting the local MC (A)… Success: Command completed successfully. (2023-08-24 05:34:01) # Killed
Step 2: Physically reseat one controller module or power off array.
CAUTION: Removing controllers can disrupt host access to data and in some circumstances requires host I/O to be stopped beforehand to prevent an unexpected outage or potential data loss.
Scenario 1: Dual controller with redundant path host configuration
These steps can be implemented without the need for a maintenance window.
The following conditions must be true:
- Hosts must have a connection path to controller A and B
- Hosts must have multipath support configured and enabled.
- All host initiators must be mapped to volumes.
For guidance, see the Module removal and replacement > customer replaceable units section in the Dell PowerVault ME5 Series Storage System Owner’s Manual.
- Physically pull controller module B forward in its slot by approximately 5 centimeters or approximately 2 inches, then reseat the controller module after 30 seconds.
- Allow approximately 2 or 3 minutes for controller B to complete boot and firmware load.
- Open an SSH session to the controller B management IP address and login as a managing or administrator level user.
- Restart peer storage controller A. Type the command: restart sc a # restart sc a While a Storage Controller is restarting, communication will temporarily be lost with the corresponding Management Controller, and also may cause a temporary loss of data availability. Do you want to continue? (y/n) y Success: Command completed successfully. – The command to restart SC A completed successfully. The controller will restart in approximately 30 seconds. (2023-08-24 07:08:39)
- When the peer controller is online, login to the PowerVault Manager and go to
Step 3:Upgrade controller module firmware to ME5.1.2.0.1 or later.
Scenario 2: Single controller module or nonredundant host path configuration
A maintenance window is required. Unexpectedly removing the single path to data means that the host loses access to data and stops responding!
For guidance, see the Module removal and replacement > customer replaceable units section in the Dell PowerVault ME5 Series Storage System Owner’s Manual.
- Notify users of the outage and follow the host operating system user guide to put the connected host in maintenance mode or shutdown hosts.
- At the array rear, switch off both power supplies for approximately 60 seconds before turning them on again.
- Allow approximately 3 minutes for controllers to complete boot and load firmware.
- Log in to the PowerVault Manager, and go to Step 3:Upgrade controller module firmware to ME5.1.2.0.1 or later.
Step 3: Upgrade controller module firmware to ME5.1.2.0.1 or later.
See the Updating system firmware section in the Dell PowerVault ME5 Series Administrator’s Guide.
- Download the controller firmware update. In a web browser, open Dell Support
- Enter PowerVault ME service tag or select the PowerVault ME model.
- Under Documentation, select the Dell PowerVault ME5 Storage System Release Notes.
- Under Drives & Downloads tab, download the Dell PowerVault ME5 Series Storage Controller Firmware
- Extract the firmware binary from the .zip file.
- Using Dell PowerVault Manager. Go to Maintenance > Firmware > System and upload the firmware binary file.
- Go to Maintenance > Firmware > System and click Activate this Version link to display the Activate Firmware dialog.
- Follow the on-screen directions to start the activation.
Post upgrade behavior
With ME5 controller firmware version ME5.2.1.0.1 administrators may occasionally receive the following information alert.
Figure 1: Information alert The Management Controller entered a memory exhaustion state and will reboot to recover. Data access will not be interrupted.
The management controller (MC) provides the management UI and CLI interface to monitor and configure the system. Restarting management services does not reboot controllers or disrupt I/O. The effect of restarting is an inability to access the management interface for 2 minutes. If you are receiving this information alert frequently, more investigation may be required to establish the cause.
