Ever wondered why a brand new installation of Windows Server 2008 RTM shows that it already has Service Pack 1 installed?
The director of project management for Windows Server, Ian McDonald, mentions in his blog, the story behind this.
Here’s the long story shortened: Windows Vista and Windows Server 2008 are supposed to share the same codebases which means service packs and patches get released at the same time and both server and client will have a common set of patches, depending on the installed components, i.e. a patch for Active Directory will not get installed on a Vista machine and a patch for Media Player will not get installed on Windows Server 2008 (unless you have the desktop-experience installed).
Windows Vista got released early. Windows Vista SP1 is already out. Then came the release Windows Server 2008, which also has the same codebase. Hence Windows Server 2008 got released ‘with SP1’.
The first service pack to be publicly (separately) released for Windows Server 2008 will be Service Pack 2.