• Troubleshooting

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    Troubleshooting

    Troubleshooting

    This section describes possible issues and workarounds, limitations, and things to be aware of when upgrading the storage processor assembly.

    Detected incorrect hardware

    If, after performing the conversion, the storage processor assembly hardware type does not match what was selected at the start of the wizard, the system will enter Service Mode. The system will not exit Service Mode until the original SP assemblies are restored. Replacing the original SP assemblies will cancel the existing conversion process. Start a new conversion process to continue.

    The issue can occur if the wrong SP assembly hardware type was selected at the beginning of the wizard. If you are sure that the right hardware is being used, please contact your service provider.

    Pre-Upgrade Health Check failed

    Excessive CPU utilization - The PUHC fails when the combined CPU utilization is above 120%. To resolve the failure, close the Hardware Upgrade Wizard, reduce workload on the system, then restart the wizard.

    The CPU utilization warning can be bypassed, and the upgrade process continued by clicking Retry. However, if you continue the upgrade with excessive CPU utilization levels, you may experience poor performance during the upgrade, and other failures may occur.
    Hardware Upgrade fails; fault LED lit

    After replacing the second SP assembly, the Hardware Upgrade wizard might display the message "Hardware Upgrade has Failed", with the option to retry the upgrade. The fault LED on the SP assembly might also turn on.

    Do not click Retry. Refresh Unisphere to see if the failure message clears. Wait at least 120 minutes after replacing the second SP assembly for the array to stabilize from the conversion.

    Review the upgrade logs to determine if the error is due to stale data in the wizard, or a true failed upgrade. The upgrade log files are located in /var/tmp/upgrade/upgrade.log. Obtain the upgrade status by using the /sys/upgrade show command. For more information about using Unisphere CLI commands, refer to the Dell EMC Unity Unisphere CLI User Guide. For more information about this issue, refer to KB519171.

    If, after waiting 120 minutes, the Hardware Upgrade wizard states that the upgrade has failed, and you cannot confirm the upgrade's status in the logs, contact your service provider.

    Hardware Upgrade wizard shows incorrect SP to be replaced

    After replacing the second SP assembly, the Hardware Upgrade might ask you to replace the same SP assembly that was previously replaced.

    Ignore the error and continue to replace the second SP assembly. To avoid the error, cancel the hardware upgrade and update the operating environment to the latest version.

    All other failures

    If any failure occurs during the conversion process, the system will enter Service Mode. Record the error and contact your service provider. The conversion can be canceled and the system can be brought back online by restoring the original Storage Processors.

    Canceling the Data in Place conversion
    The following table describes the situations in which you can cancel the DIP conversion and revert to the original storage processor assembly. Once the new SP assemblies have been inserted and the upgrade has been completed, it is no longer possible to revert to the original SP assembly.
    Situation
    Procedure to revert to original SP
    (Offline conversions only) The new SP assemblies have been inserted, but have not been powered on
    Replace the original SP assemblies and restart the system. The system automatically cancels the DIP conversion.
    (Offline conversions only) The new SP assemblies have been inserted, but the new hardware has a fault
    Replace the original SP assemblies and restart the system. The system automatically cancels the DIP conversion.
    (Online conversions only) The Hardware Upgrade wizard started, but no SP assemblies were replaced.
    Wait until the Hardware Upgrade displays "REMOVE THIS SP." Power on the SP that is indicated in the wizard by pulling it out about an inch, and then reinserting it.
    The health check failed
    Click Cancel in the Hardware Upgrade wizard.
    The DIP conversion can also be canceled in these situations via the Unisphere CLI using the command /sys/upgrade cancel. For more information about using Unisphere CLI commands, see the EMC Unity Family Unisphere Command Line Interface User Guide.