Problem: For our customer I need to find a way to upgrade the OS of all our DP's (100+) without downloading the content library all over again and with the use of SCCM OS deployment.

At the brance offices we have windows 7 pc's available to place the backup of the content.

Question:

- What is the best way to backup the contentlib and send it to one of the Win7 machines (SCCM backup or other backup method)

- How can we get the content for the OS deployment of the server to that branche? (use branchecache?) 

- Can we import the contentlib after the OS deployment is finished and the DP-role has been added?

Use content pre-staging to export all of the content on the DP. This export and later re-import is easily automated with PowerShell.

how can we prestage all contents including applications , packages, drive packages, OS images and boot images.

Is there a ready script available to do prestage content for all of these?

I have tried Microsoft's CloneDP script .. it's not usable for applications.

https://gallery.technet.microsoft.com/scriptcenter/CloneDP-for-SCCM-2012-SP1-825ce5b1

First note that's not Microsoft's script, it's a script created by a Microsoft employee.

As for applications, pre-staged content works perfectly fine for Applications.

As mentioned, this is simple PowerShell, there's no magic in the script.

Since the script isn't really what we need we are thinking of following setup:

- We are going to setup 1 or 2 windows7 pc's as Pull DP and let this one pull the content from the existing DP.

- Then setup a task sequence to install the new OS on the existing DP

- After setup re-assign the dp role and get the content from the windows 7 DP

Is there anything we need to pay special attention to, to get this setup?

Thanks

It should work, but you should test that in a lab first ... 

I concur with Torsten; however, why don't the PowerShell commands to export content fulfill your needs?

Well the powershell script is verry nice, but then we don't have a dp on site to image our server with SCCM.
With this setup (if it works like we want), we don't need to run scripts, only make a win7 pc a pull dp.
Then we can monitor everything a bit better with SCCM and after this project, we can just leave this dp as a backup.