In a Win 10 workstation I have 4 drives and need some drive/partition guidance.
Disk 1 has the 100MB EFI system partition, a 2nd 1.8TB partition with data, and a 450 MB partition following that with no drive letter assigned.
Disk 2 has a single 1.3TB partition and is classified as the Primary.
Disk 3 is a new 7.2TB drive on which I'd like to migrate Disks 1 and 2 to.
Disk 4(ssd) contains a 1TB partition on which Windows is installed.
I've tried booting directly off of disk 4 and it does not have the Windows startup files on it. That was a bit surprising as I had installed Win 10 on it originally as the only drive in the machine.
I'd like to make Disk 4 bootable, and if needed, create an EFI system partition on disk 3.
How do I make disk 4 bootable? Is it possible to create an EFI system partition on disk 3? Apparently they cannot be copied from one drive to another.