Summary:
During Azure VM restore operations, the restore job may fail with the error code Azure61462 and the message:
“The VM size 'Standard_D4as_v4' cannot boot with OS image or disk. Please check that disk controller types supported by the OS image or disk is one of the supported disk controller types for the VM size.”
The issue occurs when the selected VM size or storage type does not support the disk controller configuration of the backed-up virtual machine.
Root Cause:
Azure restricts certain VM series from using specific disk controller types (e.g., SCSI or NVMe) based on the OS type or image generation (Gen1 vs Gen2).
If the restore workflow automatically or manually selects an incompatible VM size (for example, Standard_D4as_v4) that doesn’t support the OS/disk type, the deployment fails with error code Azure61462.
Error Snippet from Logs:
RESOURCE: 400 Bad Request
ERROR CODE: Azure61462
{
"error": {
"code": "InvalidParameter",
"message": "The VM size 'Standard_D4as_v4' cannot boot with OS image or disk.
Please check that disk controller types supported by the OS image or disk is one of the supported
disk controller types for the VM size."
}
}
Impact:
The restore job fails at the VM creation step.
The data download to Azure completes successfully, but deployment of the VM in the target subscription fails.
Resolution:
Identify the failed restore job
Go to Druva Console → Jobs → Restore Logs.
Open the failed job and locate the VM size mentioned in the log (e.g., Standard_D4as_v4).
Verify the supported controller types for the VM size
Visit Microsoft documentation:
https://aka.ms/azure-compute/sizesSearch for the VM size and verify if it supports your disk controller type (e.g., SCSI/NVMe).
Select a compatible VM size
In the restore wizard, select another VM series that supports the required OS/disk type, such as Standard_D4_v3.
Re-run the restore operation.
Validate restore success
Confirm that the VM creation succeeds.
In Azure Activity Logs, you should see “Create or Update Virtual Machine – Succeeded.”
Additional Recommendations:
Always match the VM generation (Gen1 vs Gen2) and OS disk type (Standard HDD/SSD or Premium SSD) when choosing a VM size.
Use Azure’s “Create VM” wizard to cross-verify if the desired size appears as compatible before initiating restore.
Keep the restore region and availability zone consistent with the original VM’s configuration when possible.