Last night I attempted to install Ubuntu to my secondary hard drive and dual boot Windows 10. It completely borked everything. Grub screwed me over. I think my grub is still messed up and I need to fix it. How would I go about install Ubuntu 15.04 to a secondary internal hard drive while still being able to boot to windows if need be on boot. Before windows 8 this was easy but with the way Microsoft changed everything it completely shoots me in the foot. I am installing the live iso to my usb by UNetbootin. Yes I have UEFI unfortunately.
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Did you read http://askubuntu.com/questions/221835/installing-ubuntu-on-a-pre-installed-windows-8-64-bit-system-uefi-supported – ubfan1 Oct 21 '15 at 15:23
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What brand/model system? Some are difficult to get to boot anything but Windows. Best to partition in advance with ESP - efi system partition first and use Something else to choose / (root) partition. Or disconnect Windows drive and only install to second drive. Grub will only install to the ESP on sda, but should not conflict with Windows otherwise. also: https://help.ubuntu.com/community/UEFI Be sure to boot installer in UEFI boot mode. – oldfred Oct 21 '15 at 15:42
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@oldfred I am using a Sager – Wesley Pennock Oct 21 '15 at 15:56
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@ubfan1 yes but I am on 15.04 – Wesley Pennock Oct 21 '15 at 16:01
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2Possible duplicate of How to Install Ubuntu on separate hard drive in a dual boot? – Kulfy Aug 04 '19 at 19:58
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Ubuntu must be installed after windows, because windows intentionally wipes any other bootloader than its own. Even though you install ubuntu on a second hard drive, the bootloader must be installed on the master hard drive.
Yvain
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I don't have the exact solution you're looking for, but my computer is set up so it by default boots straight into Ubuntu, but when I need Windows I hit f12 and select the other drive, which means less messing with GRUB. Could something like that work?
