I was wrong on two points...
First, it's Win Server 12.
Seconds, two physical drives, 600 GB each in RAID 10. Partitioned as follows:
500 MB (EFI system)
100 MB (OEM)
3 GB (Recovery)
60 GB (Boot, drive C: designation, NTFS)
494 GB (data, drive E: designation, NTFS)
It will let me dynamically shrink and expand the E: partition at will. It won't let me expand the C: partition even though I have 60 GB of unallocated space (created by shrinking the E: partition)
Brad