Microsoft Knowledge Base Article 316298 contains the following summary:
This step-by-step article describes how to choose between a stripe set, a volume set, a stripe set with parity,
and a mirror set. This article includes a brief overview of each of these different volume types, and then it
describes the criteria to help you decide which volume type to use in your Windows NT 4.0 environment.
NOTE: Windows NT 4.0 Workstation natively supports only stripe sets (RAID 0) and volume sets at the software level. Only Windows NT 4.0 Server natively supports all of these disk configurations.