Classic Storage Account Migration Error

Espen Lever 20 Reputation points
2024-06-11T15:59:15.9333333+00:00

We received notice to migrate our Classic Storage Accounts to ARM and are encountering errors during the process. While some of the accounts have migrated successfully, others have failed with the following error message. Can anyone help me understand the issue?

Screenshot 2024-06-11 140257

Azure Storage Accounts
Azure Storage Accounts
Globally unique resources that provide access to data management services and serve as the parent namespace for the services.
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  1. Adharsh Santhanam 2,320 Reputation points
    2024-06-11T16:17:20.0733333+00:00

    Hello @Espen Lever It's likely that your Classic Storage account still contains Classic (unmanaged) disks, VM images and OS images. To migrate the account, you first need to delete these artifacts; otherwise, the migration may fail. If you're sure that you have deleted all these artifacts associated with the storage account and still the migration process fails, you can retry the migration operation using a couple of other options like using PowerShell or Azure CLI (Reference: https://video2.skills-academy.com/en-gb/archive/blogs/canitpro/step-by-step-migrate-your-classic-cloud-services-to-arm-storage-migration), using the Azure Storage Explorer tool to copy the data to a new ARM storage account etc. Also, make sure to check the common errors during the migration process documented here -- https://video2.skills-academy.com/en-us/azure/virtual-machines/migration-classic-resource-manager-errors. If the issue still persists, you might have to open a support ticket with Microsoft directly.

    Please do not forget to "Accept the answer” and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.

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  1. Luis Arias 5,901 Reputation points
    2024-06-11T16:19:41.6766667+00:00

    Hi Espen Lever,

    It looks like you are trying to migrate to ARM by the setting on storage classic option, in that case I suggest tob check the unsupported features and configuration after that you can start from the scrach with the validate and migrate action

    https://video2.skills-academy.com/en-us/azure/virtual-machines/migration-classic-resource-manager-overview#migration-of-storage-accounts

    If you are still facing the error try to please create a support request.

    If the information helped address your question, please Accept the answer.

    Luis

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  2. Sumarigo-MSFT 44,891 Reputation points Microsoft Employee
    2024-06-12T05:24:09.6866667+00:00

    @Espen Lever Welcome to Microsoft Q&A Forum, Thank you for posting your query here!

    Sorry to hear you are having issues migrating to ARM. This error has happened in the past when there was VM images, VM machines with disks, or unattached disks in the storage account. Please check to see if this is the case and delete them then retry the migration. The commands to find these resources are in the section here.

    I assume validation was successfully, There are few Unsupported configurations which are not currently supported, please refer to this article.

    Recommended to refer to this link and delete if there is any orphan disk object and images that might be impacting the storage account migration.

    Have you referred to the suggestion mentioned in this article: https://video2.skills-academy.com/en-us/azure/virtual-machines/migration-classic-resource-manager-errors

    Step-by-Step: Migrate your classic Cloud Services to ARM–Storage Migration.

    Please let us know if you have any further queries. I’m happy to assist you further.     

    Please do not forget to "Accept the answer” and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.

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