Named disks are standalone virtual disks that you create in Organization VDCs. Organization administrators and users who have the respective rights can create, remove, and update named disks, and connect them to virtual machines.
When you create a named disk, it is associated with an Organization VDC but not with a virtual machine. After you create the disk in a VDC, the disk owner or an administrator can attach it to any virtual machine deployed in the VDC. The disk owner can also modify the disk properties, detach it from a virtual machine, and remove it from the VDC. System administrators and organization administrators have the same rights to use and modify the disk as the disk owner.