How to restore from a Virtual Machines (classic) backup

Noriko 251 Reputation points
2023-01-19T06:42:10.43+00:00 
I applied Azure Backup in Virtual Machines (classic). If I want to restore this to another classic VM, I would like to select "Create new virtual machine" and restore it, but won't it be restored to an ARM virtual machine? I want to do a restore on a classic VM.
Azure Backup
Azure Backup
An Azure backup service that provides built-in management at scale.
1,125 questions
Azure Virtual Machines
Azure Virtual Machines
An Azure service that is used to provision Windows and Linux virtual machines.
7,118 questions

2 answers

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  1. Tech-Hyd-1989 5,741 Reputation points
    2023-02-02T07:38:21.3433333+00:00

    Hello Noriko,

    Let me first answer your initial question.
    No, it's not possible to restore a backup of an Azure Classic VM to an Azure Resource Manager (ARM) VM. Azure Classic VMs and ARM VMs are different deployment models and are not compatible with each other.
    If you are in need of restoring a classic VM from azure backup, we don't have a create a new VM option supported for classic VMs. Hence, you need to take a different route which is to restore the classic VMs with "Restore as disks option" and disk needs to be convert to managed disk and then create VM out of those disks.

    Important:

    As you may be already aware of the announcement of deprecation of classic VMs. This functionality will be fully retired on September 1, 2023.

    How does this affect me?

    • As of February 28, 2020, customers who didn't utilize IaaS VMs through ASM in the month of February 2020 can no longer create VMs (classic).
    • On September 1, 2023, customers will no longer be able to start IaaS VMs by using ASM. Any that are still running or allocated will be stopped and deallocated.
    • On September 1, 2023, subscriptions that are not migrated to Azure Resource Manager will be informed regarding timelines for deleting any remaining VMs (classic). Hope this helps! If you have any further questions at all, please let me know in the comments. If the answer provided by has helped, please 'Accept as Answer' and Upvote using "Thumbs-up" so that it can improve discoverability for others in the community looking for help on the same topic.
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  2. srbhatta-MSFT 8,546 Reputation points Microsoft Employee
    2023-02-09T05:41:02.95+00:00

    Hello @Noriko ,

    Welcome to Microsoft QnA.

    When restoring a classic virtual machine (VM) using Azure Backup, you can select the option to "Create new virtual machine" and restore the backup to a new VM. However, it's important to note that Azure Backup only supports restoring to the same type of VM that was backed up. So if your original VM was a classic VM, the restored VM will also be a classic VM. If you try to restore a classic VM backup to an Azure Resource Manager (ARM) VM, it will not be successful.

    Now to understand why the restoring to classic VM is not successful, we would need to check the error details.

    There may be a few possible reasons:

    1. The backup may not be compatible with the target VM. Make sure that the backup you are trying to restore is compatible with the target VM's operating system and configuration.
    2. The target VM may not have the same virtual network and storage account as the original VM. Azure Backup requires that the target VM is in the same virtual network and storage account as the original VM in order to restore the backup.
    3. The backup may be corrupted. In this case, you'll need to troubleshoot the issue and try creating a new backup of your VM.

    I recommend you to check the above points and also check and provide us any sort of error messages. Thank you.

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