Need help fixing boot order

[Haisaru]

I recently bought a Samsung 970 evo pro hoping to clone the contents of my old samsung 860 onto it. I used the samsung disk migration software t colone the contents of the old sdd onto the new one. Then turned off my pc, unlugged the old 860, and rebooted. I checked the bios and it showed windows boot manager on my new 970. Everything seemed fine so far.

 

The problem is that when I replugged my old 860 to change the boot order, the windows boot manager on my 970 doesn't show up anymore. It still showed the physical 970 drive in the bios but if I tried to boot from it it said "please insert a bootable drive." I updated the bios and messed around for a few hours in the bios hoping to fix the problem with no avail. I could only boot from the new drive when the old one was unplugged.

 

The next thing I tried was to do a wipe the new 960 drive and a clean install of windows from a usb. After successfully installing windows, with both drives plugged in, when I start my computer it brings me to the blue windows screen asking me to choose my operating system. From there I can successfully choose windows from either drive and log in. However, when I unplug my old 860, the blue screen is gone and it only says 'insert bootable drive.' Going into the bios, I can only see the physical 970 drive and no option for the windows boot manager on it.

 

I'm currently stumped for a solution and any help would be appriciated. The only thing I think of is to maybe clone my old 860 onto the 970 again and then to wipe the 860.

If it helps, my final goal is to have all of windows on my 970 and to have Linux installed onto the 860 as a dual boot.

 

New SSD: Samsung 970 Evo pro 1tb

Old SSD: Samsung 860 500gb

Motherboard: asrock z390m itx

[C2dan88]

When installing windows only connect the drive you are going to install to. Windows wont install a new bootloader if it detects an existing bootloader on a different drive..

[Haisaru]

Just now, C2dan88 said:

When installing windows only connect the drive you are going to install to. Windows wont install a new bootloader if it detects an existing bootloader on a different drive..

I clicked advanced options and I chose 900 something gb partition. I can try reinstalling with the old sdd unplugged.

[C2dan88]

Yes, only have the 970 drive installed.

[Haisaru]

It worked.I can't believe having the old drive plugged in would affect the new installation. Thanks so much for your help.