It is pretty simple what the Gurus told here, it is better to start everything from scratch installing windows, for a better less issues. I’ve succeeded on my Gigabyte Z77X-UP5 (nvme modules extracted from a Gigabyte Z97X-UP7 while i agree with you with not everyone want to start from scratch, from what i’ve read from the first time this is a DWYOR project which means could causes system not to boot at the worst times. The fact you call it “a mistake” says more about you than about the ones attempting a clone. It’s perfectly possible to clone an existing MBR disk onto the NVMe and make it bootable (clone as is, then convert it from MBR to GPT without wiping data, then resize the first partition to make 100 MB room at the beginning of the drive, then create a FAT32 partition there, then add/repair the bootloader using bcdboot or other tools). That’s fine, but not everyone wants to start from scratch by wiping all data and reinstall Windows. Your “let Win10 Setup create a new partition ” advice is hiding those facts, because by default Win10 will init the disk as GPT and format it as UEFI, i.e. Whoever is reading this doesn’t have to take my word for it, you can try it yourselves: keep the disk GTP and delete the FAT32 partition, or make it MBR instead of GPT, and you’ll see that the Bios will not list the NVMe disk as a bootable device. That’s not true unless you make it gpt + fat32 efi boot. The Bios doesn’t show it as a bootable device unless those exist.Īll guides, yours included, claim that you should see the disk in the bios among the bootable drives list. The nvme bios modules, at least the ones I’ve seen extracted from the likes of Z97 or X97 or X99 motherboards, simply don’t recognize the nvme disk if it’s not GPT with a FAT32 EFI (ESP) bootable partition. Unlike some of the old NVMe disks, which had legacy oproms, the new ones don’t have legacy oproms so they can’t boot if it’s MBR, but only if UEFI.
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