Microsoft has introduced several versions of its new embedded operating system, Windows Storage Server 2003 R2. All versions are sold only through OEM manufacturers (Dell, HP, others). Buyer beware if you are unfamiliar with the different versions and purchase the Express edition with the intention of using print services or expanding your drive capacity later.
Express Edition (1 CPU) • 32-bit and 64-bit versions available
• Up to 2 disk drives
• 1 NIC only
• No print service
• No CALs required
Workgroup Edition (1 CPU) • 32-bit and 64-bit versions available
• Up to 4 disk drives
• Up to 2 NICs
• Print service allowed
• No CALs required
Standard Edition (1-4 CPU) • 32-bit and 64-bit versions available
• Unlimited number of disk drives
• Unlimited NICs
• Print service allowed
• No CALs required
Enterprise Edition (1-8 CPU) • 32-bit and 64-bit versions available
• Unlimited number of disk drives
• Unlimited NICs
• Print service allowed
• No CALs required