Storage pool/Volume extension issues Windows Server 2019

Question

Hi All,
I have a problem with storage pool/virtual disk/volume extension. Would you be so kind to help me...
I try to explain :)

So, there is an SCDPM (System Center Data Protection Manager) which supported by me. (Usually it is a VM hosted by Hyper-V host.)
This storage pool used by SCDPM server which is protecting Sharepoint databases. Those databases are huge and so many. The protection do full backup four times on a day. And do log backup in every 15 second. So, the SCDPM and the storage pool in very hard uses.

Steps:
Created a Storage pool with six 6TB disks.
Created a Virtual Disk too.
Created a volume (ReFS, SCDPM need this).

Sometime there is not enough space left on the storage pool, so I add more physical disk to it (In this case I add 1TB disk).
Add the physical disk to the Storage Pool works like a charm.
But, when I try to extend the Virtual Disk's volume it see only the same size of volume which size was before I add the new disk.
In this case the Storage Pool is created with 6*1TB disks. I add one more 1TB disk, and when I try to extend, there is no more space, only 6TB...
I red a "solution" and I try it. --> I gave this command in an admin-powershell: "Get-StoragePool "StoragePoolName" | Optimize-StoragePool". Slowly and painfully command...
When it finished and I'm lucky I've got some space from the new disk but not the same size with added disk size. I mean, added 1TB disk, but I can extend only 750GB. If I'm lucky!!! After the optimization!
If I use bigger disk, the issue worst than smaller disk. For example, the same issue with a 3*6TB disk Storage Pool and add a new 6TB disk, I can extend only 3TB. After optimization too.

I'm totally exhausted because of this situation, I try everything what I can, but it is always failed.

That would be really great if you have any idea what I have to do, or try, anything.
If I was misunderstood (my English...) please do not hesitate to ask me about any other detail.

Thank you in advance!

BR, Zsolt

Answer 1

Hello,

Thank you reaching out.

I would suggest you check below troubleshooting Methods

Method 1 :

•Open an elevated command prompt (cmd) window and type: DISKPART
•Next, you need to list all volumes by typing: List Volume
•You need to select the volume that has the wrong file system size, type: Select Volume E
•In my case, E is the letter of the affected volume.
•Finally, you need to extend the volume by typing: Extend File System

Method 2:

A. Close DPM console and logout from Windows user session
B. Open Disk Management -> Click on your Disk -> right click on Disk and click on Refresh.

I hope this helps.

Thank you,

Answer 2

Hi LimitlessTechnology-2700, Thank you! Me and my cols try the diskpart method so many times before I wrote this problem here... Storage pool = 14TB, but VDisk1 (S:) = 13TB. No changes... ![132578-failed-to-extend.jpg][1] So I really don't know what I have to do. I try to give more parameters the "extend" command with : extend size =14680064 disk=18 extend filesystem extend size =14000000 disk=18 extend filesystem Same as before... :( But I really appreciated for your answer! [1]: /api/attachments/132578-failed-to-extend.jpg?platform=QnA