Clarification Request: VM Migration Status Due to Degraded Physical Host

Question

Dear Microsoft Support,

We recently observed that one of our Virtual Machines (vm-****) experienced a health degradation event on May 28, 2025, due to suspected underlying hardware disk degradation on the physical host. Based on the Azure Health Events and ResourceHealth alerts, a migration was scheduled, and a reboot occurred, after which the VM returned to an “Available” state.

While the VM is now operational and accessible, we have not received any explicit confirmation that the VM was successfully migrated to a healthy host.

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Key Timeline of Events (All times GMT+5:30):

07:44 AM: VM became unavailable (Unplanned)

07:44 AM: ResourceHealth alert issued — "Migration scheduled due to degraded hardware"

07:45 AM: Multiple events marked as "Activated", "Updated", and "Resolved" related to the above

07:46 AM: Health status reported as "Resolved"

Current State: VM is Available and accessible

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ResourceHealth Event Details:

Critical Alert Title: Migration scheduled due to degraded hardware

Details: “The Physical Host in which your VM is running has a potentially degraded disk. Live Migration, if applicable, will be attempted as best effort…”

Recommendation: “Redeploy the VM before 6/4/2025 2:14 AM UTC to avoid unexpected disruptions.”

We also received multiple alerts with status changes (Activated, Updated, Resolved), some of which show "Unknown" as the title and description.

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Request for Clarification:

Could you please confirm the following:

1. Was the Live Migration of the VM to a healthy physical host completed successfully?
2. Is the VM still running on the degraded hardware, or has it been moved to a stable host?
3. Based on the current state, would you still recommend manual redeployment of this VM to ensure long-term stability?

We would appreciate detailed clarification, as the health history does not definitively confirm whether migration succeeded or if further action is required.

Please let us know if you require the VM name, subscription ID, or resource group for investigation, I can send you these privately.

Thank you for your assistance.

Best regards,

Ujas Doshi

DevOps Lead

Amplify-Now

Answer 1

Hi, what likely happened is that your VM was automatically live-migrated by Azure. Around 07:44 AM, the platform probably detected disk I/O issues on the host, paused the VM, copied its memory to a healthy node, resumed it there, and marked the incident as resolved, all within two minutes. That’s why you see the “Unavailable - Migration scheduled - Resolved” timeline. You can double-check if the VM is on a new host by comparing the current hostId or checking the Activity Log and Resource Health blade. The “Redeploy before 6 June” message is just a generic warning Azure adds when a host is flagged degraded, even if migration succeeded. If you see that the VM is already on a new host, you don’t need to do anything. But if you’re unsure or want full peace of mind, you can still manually redeploy during a maintenance window with Invoke-AzVMRedeploy. In short: you're likely already fine, just verify the host ID, and redeploy only if needed.

Answer 2

Hi Doshi, Ujas,
In addition to the information provided by "Michele Ariis" you can also look into the below information.
As you want to check if your VM Was Migrated Successfully
Check Resource Health Logs by Navigate to "Azure Portal → Resource Health" for the VM and look for events like "LiveMigrationSucceeded" or "VirtualMachinePossiblyDegradedDueToHardwareFailure"

For better understanding of the above annotations refer this link https://learn.microsoft.com/en-us/azure/service-health/resource-health-vm-annotation

As there is a Recommendation: “Redeploy the VM before 6/4/2025 2:14 AM UTC to avoid unexpected disruptions.” it is suggested to redeploy the VM manually to ensure long-term stability.

To understand more about live migration, you can go through the below link
https://azure.microsoft.com/en-us/blog/find-out-when-your-virtual-machine-hardware-is-degraded-with-scheduled-events/

Feel free to reach out if you have any further queries.

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Thank You.