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Inaccessible Boot Device after Macrium Clone

Gigabyte X570 Pro Wi-Fi with 2xM.2 NVMe slots, 5800X processor

Urgent woes trying to set up dual-boot W10/W11.

  1. Starting point: With W10 installed on Sammie Evo 2TB in Mobo Slot 2, I created disk image w/Macrium Reflect. I don’t know if important, but if I tried to move this HDD to Slot 1, I would always get Inaccessible Boot Device. It was itself a clone if that matters that didn’t like to be moved slots, apparently. This install has always been on NVMe drives, and partitions on both drives in this discussion are GPT. Install has never lived on a SATA drive or MBR partition.
  2. Moved Sammie to Slot 1 (where I want it, not being blasted by my 2070 Super), scorched the earth, installed W11 clean. That install is fine, but there’s a TON of stuff on the W10 install I need for work. Gonna take me days to get everything back to working order for work in W11.
  3. Inserted WD Black 512GB M.2 NVMe into Mobo Slot 2, and restored image from Step 1 to it. Took over an hour but finally finished. Maybe slow cause Black is smaller size drive, but I had <512GB of actual data in Windows Partition in the Image so it worked (see images below)
  4. Switch boot order in BIOS to Black in Slot 2 (on latest bios BTW), go to boot up … Inaccessible Boot Device. Can’t get to my work stuff. Argle-Bargle! Should’ve made sure it worked before scorching earth 🙁

Some screenies:
https://i.imgur.com/Wj2yqdt.png
https://i.imgur.com/u9AAl43.png

So I’m booted to Disk 2 (Sammie, see attached image of Disk Management tool) in W11 ATM, disk in M2 slot 1. If I try to boot to Black (Disc 3) in Slot 2 (where Sammie was when I made the image) I get the BSOD/restart.

Baffled! Any thoughts my friends?