Partitions and Volumes
In Windows Server 2008 R2, the distinction between volumes and partitions is somewhat murky. When using Disk Management, a regular partition on a basic disk is called a simple volume, even though technically a simple volume requires that the disk be a dynamic disk.
As long as you use only simple volumes or partitions, you can easily convert between a basic disk (and partition) and a dynamic disk (and a volume). After you use a feature that is supported only on dynamic disks, however, changing back to a basic disk will result in data loss.
BEST PRACTICES Recovering or rebuilding a server that has a dynamic disk for the boot disk can be tricky. We suggest keeping your boot disk (C) a basic disk, and that you use hardware ...