Installing Windows 10 after Ubuntu on a second drive
I went ahead and did it. The operation was successful.
I:
- Disconnected the Linux HDs
- Connected the new SSD
- Installed Windows on the new SSD
- Reconnected the Linux HDs
- Set the Linux SSD as default boot-drive
- Booted into Ubuntu
- Mounted the Windows partition in Nautilus
- Ran
sudo update-grub
Grub now presents me with a list on startup were I can choose between Ubuntu and Windows.
The only small problem I had was in step 7. For some reason Ubuntu claimed that Windows had not shut down properly and thus could't mount the disk. A quick reboot into Windows and then back into Ubuntu solved it, and the drive mounted fine.
I'm not sure if disconnecting the Linux HDs were actually necessary. I did it to be extra sure I wouldn't accidentally mess up the Ubuntu installation. The Windows and Ubuntu installs are on identical SSDs.