Server: HP ProLiant ML350 G3
I installed an additional HDD, added it to the array and expanded the logical disk. I was then left with unused disk space right after the C: drive and ran diskpart.exe to expand the volume. However, I got the following error:
The volume you have selected may not be extended.
Please select another volume and try again.
This appears to be the same error described in MS KB841650:
However, it is not as I am running SP2 which includes the mentioned hotfix.