We have seen this on several occasions, with both mirrored drives (that appear as just C:) and dual drives (C: and D:).
To get the image to properly deploy and boot we have to disable the second drive, breaking the raid if any.
I’m pretty sure @Sagar_v_d had this same problem recently, with some of the same symptoms :
Has anyone else experienced problems getting images to deploy onto systems with two drives or a raid configuration?
We may have inadvertently corrected this problem by upgrading from 9.5.4 to 9.5.5, although the release notes don’t mention this issue. Before we updated we couldn’t deploy to any system with more than one drive, it would install the OS then boot to the wrong drive, every single time. For raided systems as well, it would try to boot to the mirror drive (which is not normally bootable).
Since the update, we have had no issues with raids or multiple drives at all - so we will call this one a win!