Old VM to New VM - now ultra disk will not attach.

Question

Finishing a Gen 1 to Gen 2 VM migration,
a particular VM had an "ultra" data disk attached and now it will not attach to the Gen 2 VM.
In fact, it wont attach to any VM.
In fact, the supported sizes for ultra disks cannot be found.

note

the original Gen 1 VM is deleted

with the "ultra" disk, it's not possible to copy, download, or snapshot.

Any thoughts how I can capture the contents off this ultra disk?

samy_vanderspikken · Answer

DJWayne&nbsp;&nbsp;You can try to make a snapshot of the disk, change the storage type and then mount it to another vm.&nbsp;Follow the procedure:&nbsp;https://learn.microsoft.com/en-us/azure/virtual-machines/attach-os-disk?tabs=portal#:~:text=VHD%20or%20snapshot.-,Portal,the%20VM%20configuration%20passes%20validation%2C%20select%20Create%20to%20start%20the%20deployment.,-Next%20steps%20Learn&nbsp;&nbsp;&nbsp;If you find this answer helpful, then accept this post as best answer.&nbsp;

kidd_ip · Answer

DJWayne&nbsp;&nbsp;Take a look at this:&nbsp;https://learn.microsoft.com/en-us/azure/virtual-machines/disks-convert-types?tabs=azure-powershell&nbsp;

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Old VM to New VM - now ultra disk will not attach.

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