I'm trying to install Ubuntu on my computer on an SSD, separate from the 2 disks I already have with Windows 10.
However, when I go to install Ubuntu it doesn't recognize Windows 10 being there. I am using rufus to create the flashdrive and have tried it with both MBR and GPT, and I don't have secure or fast boot on. I am unsure how to get Ubuntu to detect Windows, but when I go through the installation process, I can select to install Ubuntu on the specific SSD I want it on. This (in my mind) solves my problem but I am not confident enough in my knowledge to go through with it or be sure that it wont cause a problem later.
So my question is can I install Ubuntu this way even though it isn't recognizing Windows? And am I missing something to get Ubuntu to detect Windows?
So, you have Flash Drives A, B, C. Windows resides on A, and drive B is NTFS formatted for overflow data. You are adding drive C and you want to put ubuntu on it so that you can dual-boot.
It really comes down to the size of your SSD's. If A, B, and C are all 1TB each, make 500GB on A windows and 500GB on A ubuntu. If you have a small 128GB SSD for A, you need about 30GB for Linux 20.04 so this might be an issue for windows. In such a situation, I would upgrade to a bigger SSD. 1TB has done me well on my dual-boot with 500 windows, 500 ubuntu.
First, make a backup with Macrium Reflect or similar of A. Make sure you have your windows backup USB. You'll thank me later.
For a dual boot system, you are going to need to put your grub bootloader on A and the ubuntu root on A.
If you have unlimted storage, I would just let the program install it on whatever free portion of your A drive you freed up
If there is a way around this, I am unaware. So run diskmgmt.msc and shrink A by at least 30GB to make space for /root. Run ubuntu on your flash drive, and when it goes into how do you want to install ubuntu, choose "something else". That will load up the Gparted editor in the installer and you will need to format the partitions you are making /root as ext4.
One thing you might want to consider is making C your /home partition, particularly if you have a lot of stuff to store. For a smaller SSD on A (256GB or so), it would make sense. Format it ext4 and proceed with the install.
Gparted is like any partition editor, prone to unintended consequences. Hence the macrium.
My comment above was assuming that you had already completed the install and your windows install wasn't being detected by the ubuntu installation and adding it to the grub menu.... If that is correct, then look into the things my comment says.
BUT If you are saying you can't tell or worried about which drive has Windows on it DURING the install? there are ways to figure that out... but the easiest/safest solution:
sudo update-grub- to add windows to your grub menu
...worst case scenario, you have to figure out how to get to get them to play nice in the boot menus together... but individually, they will both still boot if the other is removed from the computer.
You can try this if you use MBR dual boot, after install both Windows & Ubuntu:
$ sudo su $ apt install os-proper $ os-proper $ grub-mkconfig > /boot/grub/grub.cfg $ reboot
If you use GPT, add a EFI filesystem at the first partition of Ubuntu when installing. Гудлак!
GRUB will only boot Windows and Linux if they are installed in the same Legacy/UEFI mode
Determine Windows 10 boot mode. Type
System Information in Windows Start panel. Under "BIOS Mode" it will say if Windows is Legacy or UEFI.
Boot a Ubuntu 20.04 Live USB in the same mode as Windows boot mode. A USB made with Rufus MBR partition scheme option will boot either way. If Windows is UEFI use Rufus GPT scheme.
Install Ubuntu to it's own SSD using the "Something else" option.
if asked, create a 500MB EFI system partition on the Ubuntu SSD.
Select the Ubuntu SSD for bootloader installation.
Continue installation as directed.
When complete, set the Ubuntu SSD as first hard drive, run
sudo update-grub to ensure all bootable drives are on the boot menu.
If you want to be completely sure your Ubuntu installation won't do any harm to your Windows installation, you can unplug the Windows disks out of your computer and strat the installation process afterwards. You'll only see one available disk when you're installing Ubuntu. After the installation is done, you can plug the Windows disks back.
This way, GRUB will only detect your Ubuntu installation, but you'll be able to boot from both Windows and Ubuntu when selecting the boot disk in your UEFI/BIOS.