Monday, March 8, 2010

Windows Server 2008; Upgrading Current IIS versions to IIS7.

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Upgrading the current Internet Information Service to IIS 7 possible, but you should meet be two pre requisites mentioned below:
·         Source operating system must be Windows Server 2003 Service Pack 1 or greater.
·         Current IIS version should be IIS 6.0
·         For Windows Vista, the source operating system must be Windows XP Service Pack 2 or greater, and IIS 5.1
NOTE: Upgrading from any version of Windows 2000, running IIS 5.0, to Windows Vista or Windows Server 2008 running IIS 7.0 is not supported.
The upgrade process takes place over three stages: detect & gather, installation, and applying of settings. These steps only apply to operating system features and settings; any file system content not created or owned by the operating system will remain intact through the upgrade process.  What this means is that all web content present on the original operating system will be present after the upgrade.
Detect & Gather
During the operating system upgrade to Windows Vista or Windows Server 2008, IIS detection components are run on the existing operating system before the actual upgrade begins. If IIS is detected on the existing Windows operating system, all metabase and IIS state information will be gathered and persisted. The information gathered is persisted in a the IIS7_Gather.log file located in the %windir%

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The installation phase consists of installing the Windows Vista or Windows Server 2008 operating system, and then installing any optional features (such as IIS) if they were detected on the original operating system. The choice of which IIS 7.0 updates to install is based on the IIS state information gathered from the original operating system.
Applying Settings
After the operating system installation and optional feature installations have completed, the state information gathered from the original operating system is applied.  This is when the IIS metabase settings from the original IIS installation are translated and updated into the new IIS 7.0 config store, ApplicationHost.config.

Oclist.exe lists all the packages to use with ocsetup.exe to add/remove a role or feature. This also tells you if something is not installed on the server.
Windows optional components are parts of the Windows operating system that can be individually added, removed, enabled, or disabled. You can use the Ocsetup.exe tool at the command prompt to install or to remove Windows Vista optional components. You must have administrative credentials to run the Ocsetup.exe tool.
For further reading on using OCSetup.exe, refer this KB article:

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