After OS disk swapping. How much time a vm tooks for starting in azure

Question

Could you please give me an answer for the below ,I will be grateful if you can give me an answer to this.

After OS disk swapping. How much time a vm tooks for starting in azure?

What could be the reason for vm taking more than 30 minutes for starting after successfully swapped the OS disk?. In the portal it is showing running,
In notification it is showing starting and in boot diagnostic it is showing the login screen. But why vm taking more time for starting?

Please provide any microsoft document related to this.

We had a vm, we deleted the vm, from its OS disk created a snapshot and created a new disk from the snapshot, after that deleted the OS disk. We swapped the new disk created from the snapshot with another VM'S OS disk. After that started the vm. But it is taking more time more than 30 minutes for starting. What could be the reason?

Answer 1

Hi @Alvaro Vinicius ,
Thanks for reaching out to Microsoft QnA.
I understand it is taking a long time for the VM to start after the OS disk swap. However, this is common, and I have seen this before. If the OS disk size is big, it takes longer time to boot up the first time on new hardware. Also, at times there are pending updates which take time to complete. Also, windows OS takes longer to boot up the first time than Linux OS.
You can check the latest boot diagnostics screenshot, and if you see the VM at the login screen (Ctrl+Alt+Del) screen, this means VM has successfully boot up. If it's a Linux VM, then you will understand the VM has successfully boot up if you see the login prompt.
Is the VM now booted up? If not, let me know, and I can help you further on this.
Also, please feel free to let me know if you have any further questions. Will be happy to answer them.

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