Editing Windows Server 2003 (section)

====Editions====
Windows Storage Server 2003 R2 was available in the following editions:<ref>{{Cite web |title=Introduction to Per Core Licensing and Basic Definitions |url=https://download.microsoft.com/download/3/d/4/3d42bdc2-6725-4b29-b75a-a5b04179958b/percorelicensing_definitions_vlbrief.pdf |date=April 2017 |access-date=2023-03-12}}</ref><ref>{{Cite web |title=Microsoft Windows Storage Server 2003 R2 x64 Editions Important Information |url=https://dl.dell.com/manuals/all-products/esuprt_electronics/esuprt_software/esuprt_operating_system/ms-win-storage-srvr-2003-r2-x64-edtn_reference%20guide_en-us.pdf |date=September 2006 |access-date=2023-01-14}}</ref>
{| class="wikitable" style="margin:auto; text-align:center;"
|-
!
! Express
! Workgroup
! Standard
! Enterprise
|-
| Number of physical CPUs<ref group=lower-roman name="CPUZ" />
| colspan="2" | 1 || 1–4 || 1–64
|-
| x64 variants available
| {{Yes}} || {{Yes}} || {{Yes}} || {{Yes}}
|-
| Numbers of disk drives
| 2 || 4 || colspan="2" rowspan="2" | Unlimited
|-
| NICs
| 1 || 2 
|-
| Print service
| {{No}} || {{Yes}} || {{Yes}} || {{Yes}}
|-
| CALs required
| {{No}} || {{No}} || {{No}} || {{No}}
|-
|Clustering
| {{No}} || {{No}} || {{No}} || {{Yes}}
|-
| iSCSI target support
| {{Optional}} || {{Optional}} || {{Optional}} || {{Optional}}
|}
{{Reflist |group=lower-roman |refs=
<ref name="CPUZ" group=lower-roman>Microsoft defines a physical CPU/processor as a single socket/node on the systemboard. For O/S licensing purposes, a dual-socket single-core (Intel Pentium/4 Xeon, AMD Athlon/64) system counts as a total of 2 processors, whereas a single-socket quad-core CPU (such as AMD's Opteron and Intel's Xeon) counts as 1 processor. Microsoft's policy has no bearing on how third-party software vendors (such as Oracle) administer CPU licensing for its server applications.</ref>
}}
Windows Unified Data Storage Server is a variant of Windows Storage Server 2003 R2 with iSCSI target support standard, available in only the standard and enterprise editions.<ref>Microsoft Windows Unified Data Storage Server 2003 whitepaper – Microsoft Corporation (October 2006)</ref>