Can I merge two drives C and E from 1 OS disk in C:\ drive in Azure VM?

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Can I merge two drives C and E from 1 OS disk in C:\ drive in Azure VM?

SMN 20

I have Azure VM with 2 disk. Data is on 2nd disk. OS disk has 2 drives, C and E, and previously data was on E drive. I copied all data on 2nd disk and E drive is free.Can I merge those 2 drives C and E in C drive on OS disk?

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Nikhil Duserla 6,865 Microsoft External Staff

Hi @SMN,

We understand from your query that you are trying to merge the Disc C and E.

In your current configuration, it's not feasible to combine two physical drives to expand the size of your C drive. Instead, you can only copy the data from your disk 1 (C:) and transfer it to your new disk 0 (E:). However, this process cannot be accomplished directly within Disk Management, as it does not offer the functionality to merge drives.

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SMN 20 Reputation points

2025-03-20T05:59:53.8433333+00:00

I have 3 disk in my Azure Vm.

Disk 0: is temporary storage disk with VM

Disk 1: is attached OS disk having 2 drives C and E. I want to merge this two drives.

Disk 2: is attached disk containing data in F drive.
Nikhil Duserla 6,865 Reputation points Microsoft External Staff

2025-03-20T07:14:30.2633333+00:00

Hi @SMN,Thank you for bringing up this again.

If drive E is shrunk from the same Disk 1 where the C drive exists, it is possible to merge them into a single drive.

However, if it is attached as a new disk from the portal, it cannot be merged because it is a separate physical drive.
SMN 20 Reputation points

2025-03-20T10:52:11.9166667+00:00

Disk 1 (OS Disk) is attached and it is SSD Premium. Disk with the Vm is temporary storage(Disk 0).

So can I merge C and E drive which is of Disk 1?
Nikhil Duserla 6,865 Reputation points Microsoft External Staff

2025-03-20T12:30:43.13+00:00

Hi @SMN,

Yes, you can merge C&E if both are same of Disk 1. If you have any further queries, do let us know.

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Can I merge two drives C and E from 1 OS disk in C:\ drive in Azure VM?

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