disk management

Question

My 2TB disk is reported by Disk Management as 400MB: How i can solve this error

Answer 1

@samara abbasi Welcome to Microsoft Q&A Forum, Thank you for posting your query here! Adding more info to the above answer. As I understand you are getting this error in Azure Disk am I correct, If not correct me and also share the screenshot of the error message? If your 2TB Azure disk is reported by Disk Management as 400MB, it is possible that the disk is not initialized or partitioned correctly. To solve this issue, you can try the following steps

1. Open the Azure portal and navigate to the virtual machine that the disk is attached to.
2. Stop the virtual machine to ensure that there are no active I/O operations on the disk.
3. Navigate to the "Disks" section of the virtual machine and locate the 2TB disk.
4. Click on the disk and select "Disk Management" from the menu.
5. In the Disk Management console, locate the 2TB disk. It should be labeled as "Unknown" or "Not Initialized".
6. Right-click on the disk and select "Initialize Disk".
7. In the Initialize Disk dialog box, select the disk and choose the partition style (either MBR or GPT).
8. Click "OK" to initialize the disk.
9. Right-click on the unallocated space on the disk and select "New Simple Volume".
10. Follow the prompts in the New Simple Volume Wizard to create a new partition on the disk.
11. Assign a drive letter to the new partition. After completing these steps, the disk should be recognized as a 2TB disk and you should be able to use it normally. Start the virtual machine to ensure that the changes take effect. If you still encounter issues, I would recommend you to contact Azure support, so If you have a support plan, I request you file a support ticket, else please do let us know, I will help you with the different option. Please let us know if you have any further queries. I’m happy to assist you further.

---

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

Answer 2

Hi , You may need to Extend volume from Disk management , please check below link for more info https://learn.microsoft.com/en-us/windows-server/storage/disk-management/extend-a-basic-volume

If the above is useful please click Accept Answer

Answer 3

Hello @samara abbasi Thank you for posting in Q & A forum. You can expand data disks without deallocating your VM. The host cache setting of your disk doesn't change whether or not you can expand a data disk without deallocating your VM. Below are the steps to follow

1. In the Azure portal, go to the virtual machine in which you want to expand the disk. Select Stop to deallocate the VM.
2. In the left menu under Settings, select Disks.
3. Steps to follow Resize disk

---

If this answers your query, do click Accept Answer and Up-Vote for the same. And, if you have any further query do let us know.