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Azure Backup Failed

Handian Sudianto 5,666 Reputation points
2025-01-08T00:01:18.4766667+00:00

Hello,

One of my VM often have backup failure with this message. Usually we reboot the VM and the backup run successfully.

Since this happens often, how we can permanent fix this issue?

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Azure Backup
Azure Backup
An Azure backup service that provides built-in management at scale.
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Azure Virtual Machines
Azure Virtual Machines
An Azure service that is used to provision Windows and Linux virtual machines.
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  1. Silvia Wibowo 4,846 Reputation points Microsoft Employee
    2025-01-08T00:51:50.8166667+00:00

    Hi @Handian Sudianto , I understand your Azure VM often have backup failure.

    Please follow the steps from this guide: VM agent unable to communicate with Azure Backup

    Please accept an answer if correct. Original posters help the community find answers faster by identifying the correct answer. Here is how.

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  2. Pavan Minukuri 1,025 Reputation points Microsoft Vendor
    2025-01-08T19:33:56.2+00:00

    Hi @Handian Sudianto
    Welcome to Microsoft Q&A, Thanks for asking question here!
    If backup failures occur on a VM and rebooting the VM fixes the issue temporarily, there may be a problem with the VM causing the failures. please follow with below steps:

    1.Make sure your backup settings are correct. Incorrect configurations can cause backups to fail. Check that your backup software works with your VM setup and that all the settings are properly configured. Common mistakes to avoid are:

    • Guest OS Backups: Don’t back up through the guest OS. Instead, back up at the VM host level to avoid performance issues and make management easier.
    • Unsupported OS Versions: Check that your backup software supports the operating system on the VM. Unsupported versions can cause backup failures.

    2.If your VM uses Windows Server, check that the VSS writers are working. Run the command vssadmin list writers in the guest OS to see their status. If any writers are failing, it could cause backup failures.
    3.Security software like antivirus or firewalls can sometimes block backups. Make sure your antivirus and firewall settings let your backup software work without any problems.
    4.Backups can use a lot of resources. Check CPU and memory usage during backup times to make sure there are enough resources for both the VM and the backup.
    5.Perform regular maintenance tasks such as:

    • Disk Cleanup: Ensure there is enough disk space available for backups.
    • Snapshot Management: Regularly check and consolidate snapshots, as excessive snapshots can lead to performance issues and failed backups

    6.Make sure you are using the latest version of your backup software, along with any updates or patches that fix known backup problems.

    Reference link: https://www.techtarget.com/searchdatabackup/tip/Top-five-mistakes-made-when-backing-up-VMs-and-how-to-prevent-them

    Please let me know if anything required!

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