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Disk A: 100GB
Disk B: 200GB
Disk C: 400GB

Suppose I had created a 300GB pool using A and B. Then, I created a "simple" virtual disk on it, whose size is 300GB. Then, I only have 10GB data files on that volume. Logically, it is not impossible to add C to the pool and then remove A, while keeping the virtual disk. The System can just copy the data from A to C before A's removal.

I tried this with the Storage Spaces of Windows 10, and it worked as I expected. But when I tried it on Windows Server 2016, the popup message said the virtual disk must be deleted.

If Storage Spaces can do, I think Storage Pool could do that too. Is there a way, or is it impossible on Storage Pools?

  • The GUI (I use win2012R2) is very quirky. Last time I tried to add a simple v.disk when there were 3TB free in pool, but it refused, saying not enough space. I could create only one with size of about 600 GB. Then immediately after that I tried to create another simple disk with 2.4 TB and it succeeded without a hitch. Not a good vibe from a system to which you trust your data. – David Balažic Oct 16 '16 at 19:32
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After a lot of research... The following worked. I had to use the PowerShell.

  1. Get the disk a unique thing to point the disk. Get-PhysicalDisk may do it, but if there same FriendlyNames or SerialNumber is empty, run Get-PhysicalDisk | Select-Object UniqueID to get the GUID.

  2. Retire the disk to remove. If -UniqueID is omitted it takes the next argument as a FriendlyName. Set-PhysicalDisk -UniqueID "....." -Usage Retired

  3. Open the Server Manager. Go to Storage Pools. Right-click the disk to remove and select Remove Disk.

Then it does not say the virtual disk needs to be removed. It says that Windows is repairing the affected virtual disks. I checked the virtual disk volume after the removal of the disk. The volume was marked as healthy and I could see the files were intact.

I wonder why this 'retiring' is not available in the GUI.

  • Mark answer accepted so that this doesn't hang around 'unanswered'. Nice work. – Xalorous Sep 28 '16 at 22:33

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