I have a Server 2012 server with 3x2TB drives set up in a parity layout, giving me 4TB of space. I want to add another 2TB to that virtual disk. However, when I add the drive, it shows up as additional free space in the Storage Pool, but if I try to increase the capacity of the Virtual Disk (using Extend Virtual Disk), even by a single GB, it fails and says:
The physical resources of this disk have been exhausted
I went with Storage Spaces because my understanding was that it was designed to allow me to expand the virtual disk later. How can I do this?