huge problem with mbr2gpt

[Atomic12]

Hi,

I am having big problems with the implementation of a mbr2gpt step in an win7 to win10 upgrade TS. We want to update our Windows 7 machines, mainly Dell Precision 5810 and 5820 to windows 10 1903, and so far I have managed to succesfully implement every step that we need (well almost) but this mbr2gpt simply fails. I have a tread open on technet forums with all the infos: https://social.technet.microsoft.com/Forums/en-US/cdadd583-0853-4b34-a073-2e87fd950acf/mbr2gpt-cannot-find-os-partition?forum=ConfigMgrCBOSD

I am aware of the problem with 1903 and reagent.dlls having to be implemented in the boot.wim - I have done this step and implemented the files according to the article on docs.microsoft.com but still receive and error "Cannot find OS partitions for disk 0". The disk is a simple windows 7 layout consisting of a reserved 100mb boot partition and C: partition.

Any thoughts? has anybody done this successfully without a 3rd party app? Powershell? I have no user state migration in sccm.

 

Cheers

[pcteklink]

Are you able to disable the step for mbr2gpt and as a test run mbr2gpt /convert /allowfullos from within Windows? 

Are you using the MDT TS or a SCCM default TS (Task Sequence) 

Where are you placing the Run Command Line step ? 

 

 

 

[anyweb]

also, check your partition layout on Windows 7, you need to know exactly what you are dealing with in order to get it to work. Diskpart will be your friend in troubleshooting as will pause statements before, and after the mbr2gpt step.

[Atomic12]

Hi guys,

thank you for answering, I am sure that the disk layout does not correspond with the tool to work, simply to many partitions. I have abandoned this approach, either i leave the disk like it was (MBR) or we are doing a fresh install of Win10 1903.

Cheers.