How can I set up dual boot with second hard drive that already has linux installed on it?

[crayon_proof]

I have a HDD from a laptop that has Linux already installed on it (laptop 1). I'd like to pop that HDD into laptop 2 with an HDD caddy and dual boot to windows 10 (currently on laptop 2) and Ubuntu (currently on hdd from laptop 1). The problem I'm having is that I'm not sure how to get it so it asks which drive to boot into on startup (I think that's the grub 2 menu but I'm new to this)

 

I CAN boot into the Ubuntu drive on my desktop pc if I disconnect the windows SSD before startup but if they're both connected, it just boots to windows. UFEI also only shows the windows SSD under boot options.

 

The drive with Linux already has some files and projects on it that I'd rather not move anywhere which is why I don't want to do a fresh install of Linux on that drive once it's in laptop 2.

 

Happy to hear any solutions! Thanks.

[Ashleyyyy]

ok. set it to boot linux, then once you're in Linux run in terminal: sudo update-grub

 

that will add windows to the grub menu and then you can pick which OS you want to boot to. 

[Master Disaster]

3 minutes ago, crayon_proof said:

I have a HDD from a laptop that has Linux already installed on it (laptop 1). I'd like to pop that HDD into laptop 2 with an HDD caddy and dual boot to windows 10 (currently on laptop 2) and Ubuntu (currently on hdd from laptop 1). The problem I'm having is that I'm not sure how to get it so it asks which drive to boot into on startup (I think that's the grub 2 menu but I'm new to this)

 

I CAN boot into the Ubuntu drive on my desktop pc if I disconnect the windows SSD before startup but if they're both connected, it just boots to windows. UFEI also only shows the windows SSD under boot options.

 

The drive with Linux already has some files and projects on it that I'd rather not move anywhere which is why I don't want to do a fresh install of Linux on that drive once it's in laptop 2.

 

Happy to hear any solutions! Thanks.

Firelighters instructions should work but you could also just use the built in BIOS boot menu to switch between Windows snd Linux.

[Ashleyyyy]

EDIT: pressed the wrong thing. oops.

[Ashleyyyy]

2 minutes ago, Master Disaster said:

Firelighters instructions should work but you could also just use the built in BIOS boot menu to switch between Windows snd Linux.

that would be annoying though... grub is easyer. 

[VanBantam]

On 9/22/2018 at 3:09 PM, firelighter487 said:

ok. set it to boot linux, then once you're in Linux run in terminal: sudo update-grub

 

that will add windows to the grub menu and then you can pick which OS you want to boot to. 

AH the missing step!  I've been wondering how to do that

thx