Question Win 10 confusion, I want two hard drives with one per each OS, but Windows freaks out and is confused

Dec 24, 2024
32
3
35
Win 10 confusion, I want two hard drives with one per each OS, but Windows freaks out and is confused.

What I want is this. I want one hard drive

Which is

NVMe
and there is a Sata drive.

I want the NVMe drive to be my primary system OS that I use daily. And I want the second hard drive to be a backup operating system that I also use with the computer.

I already have an OS on the NVMe which is Windows 10 (keep in mind, they are the same OS build, etc). I went to install a second sata hard drive. I went to install the same OS on the second hard drive which is SATA. I plugged in the USB with the copy of Win10. I formatted the drive to be 85GB partition. It installs and then resets. Then it goes into some strange configuration that I never saw before. It tells me to select what OS. Instead having each hard drive as bootable in the BIOS.

I wanted the secondary hard drive to be disconnected when I'm not using it. The reality is, I want that the hard drive to have a copy of Reflect, so I can do full system back-ups of the 1st NVMe hard drive that I use daily with everything installed on it.


I will have it disconnected unless I need to use it for reflect or other software that I want to test out.

What it actually did was not even have that second hard drive as bootable in the bios. It just says NVMe as the only bootable hard drive. I still get it to select the OS volume, of course. But when I disconnect the sata it goes into some complicated error saying there has been a hard drive disconnected.

And then when I get into disk management, it seems that a 100MB MBR volume drive is tied to both hard drives? Anybody know why it's doing this? I guess I'm assuming, I have to have each hard drive disconnected and not connected when I install the operating system? Or it gets confused. I wanted each hard drive to have its own MBR. By the way, the NVMe is going to be refomatted. If I go to reformat it now. I guess the second hard drive will never be bootable?
 
Last edited:
Remove nvme drive before attempting to install win10 on the sata drive. This will prevent Win10 installing bootloader on other drives as it likes to do.
LMAO, that's what I thought. Oh boy. I will reformat and install each drive separate as they are both disconnected. I will clear and reformat both drives now.
 
  • Like
Reactions: boju