MDT Dell Win7 + Win10 x64

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In this example I will use OSDDrivers to work in MDT to support the following Dell models with Windows 7 x64 and Windows 10 x64
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Latitude 5480
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Latitude 5490
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OptiPlex 5050
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OptiPlex 5060
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Precision 7510
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Precision 7520
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Precision 7530
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Precision 7710
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Precision 7720
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Precision 7730
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Intel Drivers
I'll start by adding Intel Wireless and Intel Display using the following command.  The OsArch parameter will limit my results to x64 only
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Save-OSDDriver -WorkspacePath D:\OSDDrivers -OsArch x64 -Pack
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When prompted, I'll select all the ones that are compatible with Windows 7 and Windows 10 and press Ok
This will take a little while to Download, Expand, and Package
Dell MultiPack Win7
Combining Operating Systems is not recommended, so I'll start with Windows 7 using the following command line.  Dell Model Packs combine both x64 and x86, so there will be some cleanup afterwards
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Save-DellMultiPack -MultiPackName Win7 -WorkspacePath D:\OSDDrivers -OsVersion 6.1 -RemoveIntelVideo
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If there are multiple Dell Models to select, its easiest to sort by model, and then multi-select the ones I want.  Not all of the Dell Models in my list are Windows 7 compatible, so there will be some Models that are not selected
The process will take some time, but should quicken as more models are processed
The end result was that 6 of the Dell Models on my list were packaged to 2.26GB.  The original size of these Dell Models Packs was 12GB
Remove x86
If I do not need to support x86, then I can easily remove the x86 directory to recover 417MB of space
Remove Video
If I know that I don't need an Nvidia or AMD Video, and I did not use the Parameters to remove them before building the MultiPack, I can easily determine which CAB contains those drivers by searching the Expanded directory, or by looking in the MultiPack in the DDF file for a list of files in the CAB.  The ATI drivers consume over 600 MB in this package, so remove what is not needed
Size Results
Dell MultiPack Win7 x64 (6 Models)
Total Size
Download Size
5.55 GB
Expanded Size
12 GB
MultiPack Size
2.26 GB
Remove x86
1.85 GB
Dell MultiPack Win10
Next I'll create a new Dell MultiPack for Windows 10.  I need to make sure that I give it a different Name than my Windows 7.  The reason for naming them different is that Dell can use the same Driver Name, but the packages may be different depending on the OS, so if I merge the two, I may find that I have two Packages of the same name that have different content.
In this case I will also remove Audio drivers and use the Windows 10 Inbox Drivers to save space.  For this, I need to add the RemoveAudio parameter.
I also know in advance that my company uses Nvidia discreet Video, and not AMD, so I'll use the RemoveAmdVideo parameter to exclude these files
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Save-DellMultiPack -MultiPackName Win10 -WorkspacePath D:\OSDDrivers -RemoveIntelVideo -RemoveAudio -RemoveAmdVideo
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The process may take a while, but it will speed up in the end
This is what the resulting MultiPack looks like
Import Clixml
In the MultiPack directory, there is a clixml file that can be used to obtain information about MultiPack that was generated
Size Results
Dell MultiPack Win10 x64 (10 Models)
Total Size
Download Size
10.8 GB
Expanded Size
25.3 GB
MultiPack Size
2.18 GB
MDT Integration
The first step is to copy my Packages
And just paste it somewhere in the MDT directory structure.  Make sure you have it in a Selection Profile if you use those
Once the files are copied, it can be added to the Task Sequence
The following should be the Command line that gets used.  Adjust accordingly
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PowerShell.exe -ExecutionPolicy Bypass -File "%DeployRoot%\OSDDrivers\Deploy-OSDDrivers.ps1"
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Complete
This is now ready to deploy in 5.5GB total space (versus 37GB in Dell Driver Packs) with very minimal effort.  One thing to think about is that 3GB of this space is AMD or Nvidia Video Drivers