Sharing few other supporting screenshots for the ddve installation issue

 

2 disks added - 1 for NVRAM with size 10 GB and other data disk. But still below errors seen

 

 

to begin at the beginning, how did you actually deploy the DDVE on hyper-V? This as you mention that you didn't add a NVRAM disk as that comes rather exactly?

EDIT overlooked the fact it was hyper-v win 2016 and 2019, so that is within supported range. So that part should be OK. Then it is mainly about how it was deployed...

for example the procedure to deploy DDVE with DDOS7.9:
https://www.dell.com/support/manuals/en-us/dd-virtual-edition/dd_p_ddve-7.9-on-prem_ig/installing-the-ddve-on-hyper-v-using-the-gui?guid=guid-f8cc2952-ee4d-42b0-83ad-a46cf35f8b3a&lang=en-us

followed by https://www.dell.com/support/manuals/en-us/dd-virtual-edition/dd_p_ddve-7.9-on-prem_ig/configuring-the-ddve-on-hyper-v-using-the-gui?guid=guid-bbc00717-937c-413a-acba-e3df740ca111&lang=en-us

and the required CPU and memory that goes along with the intended DDVE size you want to deploy:

https://www.dell.com/support/manuals/en-us/dd-virtual-edition/dd_p_ddve-7.9-on-prem_ig/initial-virtual-machine-configuration?guid=guid-7c619c1b-e3a7-427c-8533-5c6619695ce7&lang=en-us

As it states in the 2nd link:

"You have created the minimum configuration for a functioning DDVE instance:

1. OS disk is attached at IDE controller zero.
2. vNVRAM disk is attached at the first SCSI controller : location zero.
3. Data storage disk is attached at first SCSI controller : location one.
4. For a larger capacity DDVE instance, you can add SCSI controllers, but doing so does not increase performance.

"

EDIT or rather the whole PDF https://dl.dell.com/content/manual60593742-dell-emc-powerprotect-ddve-on-premises-7-9-installation-and-administration-guide.pdf?language=en-us&ps=true