Expanding an OS disk on an Azure VM

Question

Expanding an OS disk on an Azure VM

Anonymous

Hi.

We have 2 virtual machines in Azure that were spec'd incorrectly by the vendor and we find we are running out of disk space on the OS disk. Is there a way to increase the size of the OS disk without having to recreate the VM?

These are both production VMs. They can be shut down for a small period of time but whatever has been installed on the OS disk, has to remain installed. Is this even possible?

Ravi Kanth Koppala 3,391 Reputation points Microsoft Employee Moderator

2022-05-13T03:55:18.99+00:00

@Anonymous ,
Just checking in to see if you got a chance to see the suggested response below. If the suggested response helped you, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". Thanks.

2 answers

Your answer

Ravi Kanth Koppala 3,391 Reputation points Microsoft Employee Moderator

2022-05-13T03:55:18.99+00:00

@Anonymous ,
Just checking in to see if you got a chance to see the suggested response below. If the suggested response helped you, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". Thanks.

Answer 1

guillaume v 6

Hello,

This should be the process:

Stop the VM
Go to Disks
Select the disk
Click Size + performance
Select the SKU
Restart the VM

Answer 2

Ravi Kanth Koppala 3,391 Microsoft Employee Moderator

@Anonymous ,

Thank you for reaching out to the Microsoft Q&A platform. Happy to answer your question. Expanding the OS disk on the Azure VM is a two-step process.

You will need to expand the managed disk size in the Azure Portal: https://learn.microsoft.com/en-us/azure/virtual-machines/windows/expand-os-disk#resize-a-managed-disk-in-the-azure-portal
Once that is complete you will need to expand the volume in the operating system: https://learn.microsoft.com/en-us/azure/virtual-machines/windows/expand-os-disk#expand-the-volume-in-the-operating-system

Please suggest if you have any questions. Happy to assist you. Thanks.

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Please "Accept as Answer" and Upvote if any of the above helped so that, it can help others in the community looking for remediation for similar issues.

Tammy Li 0 Reputation points

2023-04-24T08:29:21.5266667+00:00

I also need to expand OS disk capacity.
As your guide in Azure Portal, we need to deallocate VM first : Select Stop to deallocate the VM. Does "deallocate" equals deleting VM?
Kristoffer 11 Reputation points

2023-04-24T08:50:21.46+00:00

No deallocate does not equal deleting the VM, it's just shut-down.
Tammy Li 0 Reputation points

2023-04-25T02:20:35.4166667+00:00

Thanks Kristoffer, My instance is similar production environment, I'll deallocate VM and expand OS disk.

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Expanding an OS disk on an Azure VM

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