We are using MECM to image our UCS devices with Windows Server 2019 and are frequently encountering an error during the phase where it lays down the OS. It sees the Windows partitions and lays down the files on that partition, but fails when it tries to access the system partition. Some systems image fine using the exact same steps, but on the ones that fail, nothing we have tried will resolve it. We are setup with UEFI and we are PXE booting into WinPE and this is the error we are seeing:
System partition not set ApplyOperatingSystem 8/4/2023 9:32:24 AM 2912 (0x0B60)
Unable to find the partition that contains the OS boot loaders. Please ensure the hard disks have been properly partitioned
Unspecified error (Error: 80004005; Source: Windows)
We have tried partitioning with the built-in disk partition commands for UEFI as well as manually scripting with diskpart and we still get the error. While in WinPE I have run diskpart and viewed the partitions and confirmed all partitions are setup and appear to be correct. It's not failing on all systems, which makes me think this could be a configuration issue with some systems. My hardware team is saying it's properly configured because we can manually build the system with an ISO, but that's not a viable solution.
These are the steps I have used when trying to manually run diskpart.
select disk 0
clean
convert gpt
create partition efi size=500
format quick fs=fat32 label="System"
assign letter="S"
create partition msr size=128
create partition primary
shrink minimum=450
format quick fs=ntfs label="Windows"
assign letter="C"
create partition primary
format quick fs=ntfs label="Recovery"
set id="de94bba4-06d1-4d40-a16a-bfd50179d6ac"
gpt attributes=0x8000000000000001
Any help would be greatly appreciated.
