Windows Server 2008R2 in-place upgrade to Windows Server 2012/2012R2
Previous article showed that in-place upgrade from Windows Server 2008 to Windows Server 2012 is possible only if it has Hyper-V role configured and it is impossible to do that on Windows Server 2012 R2.
Situation looks much better when you plan to do in-place upgrade of Windows Server 2008 R2 into Windows Server 2012/2012R2. This is supported but requires some administrator’s attention before server will be upgraded.
Below you can find some hints for that process.
First of all, you need to evaluate if software installed on your Windows Server 2008 R2 is compatible and supported on Windows Server 2012/2012R2. When you find any incompaticle software you need to
- upgrade it to supported version before OS upgrade (recommended action)
- uninstall it from the server before OS upgrade
- leave it as is but remember that Windows Server after in-place upgrade may not function properly
Important! Some applications may be compatible with Windows Server 2012/2012R2 but their version might not be sufficient to support full application features. You need to evaluate it also before OS in-place upgrade.
When all appropriate steps were taken, are able to start in-place upgrade. To do that follow procedure listed below
Start Windows Server 2012/2012R2 setup wizard from DVD media
Wait for Windows to copy necessary files to the server
When those files were copied to local hard drive, you should go on-line and install all new Windows Server 2008 R2 updates (recommended)
Note! The Internet connection will be required!
Wait for system update to finish the process
At this moment you have to provide valid Windows Server 2012/2012R2 product key to start installation
When system is updated, you’ll see a screen where you need to choose appropriate Windows Server 2012 edition to which you want to upgrade Windows Server 2008 R2
Accept license terms and go to the next step
Now, everything is ready to start in-place upgrade. Click on “Upgrade: Install Windows and keep files, settings, and applications”
Review applications compatibility report and if there are no errors, continue the installation
Windows Server upgrade will start
During the upgrade process, several actions will be executed like:
- collecting files
- collecting settings
- collecting applications
In the next step, Windows Server will install its own files
Your server will be restarted when all files were extracted. During system restart, you have short time to decide if you wish to continue in-place upgrade or you want to roll back to the previous Windows Server 2008 R2 OS
Windows Server 2012 starts preparing itself for devices configuration
The server will be restarted to finalize settings
and finally, logon screen will appear. That means the in-place upgrade process has been finished.
Author: Krzysztof Pytko