This article lists the hardware that does not support dynamic disks.
Dynamic disks are not supported on the following hardware:
Institute of Electrical and Electronics Engineers (IEEE) 1394 serial bus
Universal Serial Bus (USB)
Disks in laptop computers or laptop docking stations
A dynamic disk is a physical disk that contains dynamic volumes created by using Disk Management. Dynamic disks do not use traditional partition tables like primary and extended partitions (logical drives); therefore, dynamic disks cannot be accessed by MS-DOS, Windows 95, Windows 98, Windows Millennium Edition (Me) or Windows NT operating systems.
For additional information, click the article numbers below to view the articles in the Microsoft Knowledge Base:
222189 Description of Disk Groups in Windows 2000 Disk Management
232463 Option to Upgrade Basic Disk to Dynamic on Laptop Not Available