expand disk size for windows vm

Steve Fisher 20

I dont know how to expand the disk when i go to try i see this
Name

MSP-WEBDAV-01-MSP-WEBDAV-01-0-201609261636210133

Storage account type

Standard_GRS

Size (GiB)

Disks can be resized only when they are unattached or the owner VM is deallocated.

Performance

Provisioned IOPS

500

Provisioned throughput (MB/s)

60

Operating system

Windows

am i in the incorrect spot or do i just need to shut down the machine?

Accepted answer

TP 118.8K Reputation points Moderator

2025-03-28T20:06:34.5933333+00:00

Hi Steve,

Yes, for OS disk you need to Deallocate the VM before you can expand the disk.

How to expand virtual hard disks attached to a Windows virtual machine

https://learn.microsoft.com/en-us/azure/virtual-machines/windows/expand-disks

Please click Accept Answer and upvote if the above was helpful.

Thanks.

-TP
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Syed Aaqid Ali 490 Reputation points Microsoft External Staff Moderator

2025-03-28T21:06:16.7666667+00:00

Hi Steve Fisher, I trust that the solution provided by TP will be helpful. Additionally, please find below the steps to expand the disk size.

In the Azure portal, go to the virtual machine in which you want to expand the disk. Select Stop to deallocate the VM.

In the left menu under Settings, select Disks.

Under Disk name, select the disk you want to expand.

In the left menu under Settings, select Size + performance.

In Size + performance, select the disk size you want. Warning The new size should be greater than the existing disk size. The maximum allowed is 4,095 GB for OS disks. (It's possible to expand the VHD blob beyond that size, but the OS works only with the first 4,095 GB of space.

Select Resize at the bottom of the page.

Reference: How to expand virtual hard disks attached to a Windows virtual machine

Please do not forget to “up-vote” wherever the information provided helps you, this can be beneficial to other community members.

If you have any other questions or are still running into more issues, let me know in the "comments" and I would be happy to help you.
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