Hard Drive is not read by VM

Hello all!
I have a VM with only 1 hard drive (.vhdx) which contains the OS and I tried to add another existing hard drive, as a secondary one.
However, my VM aren't reading this second hard drive.
Is there some process that needs to be done to make it visible for the VM?
Thanks in advance.
Lucas Gustavo

Hi Lucas,
Please ensure that the existing VHD can be attached/readed on hyper-v host .
If yes , you can try to add a new scsi controller for attaching the existing VHD in VM settings .
If the host can read the VHD , as a workaround you can attach it as a pass-through disk for that VM .
Best Regards
Elton Ji
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