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I know it has been asked before but I had trouble relating to my options during my installation so I felt the need to ask again. I'm on a Windows 8.1 pre-installed laptop that has been upgraded to Windows 10. I want to install Ubuntu as dual-boot. I've already partitioned my drive for Ubuntu and I got to the installation screen. I had no issues until I had to choose my boot load installation. I had no idea what to choose and I need your guidance since I'm new to this. I'll post some screen-shots down below.

Thanks in advance!

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Bartu
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  • Best practice would be install GRUB (Ubuntu's bootloader) at the very beginning of the hard-disk (in the root of hdd), usually meaning /dev/sda/. Your particular case is a little different: you have two (or more) hard-disks united by RAID technology. That's why they appear as one device called dev/sdd. And that's why the long names and common mounting directory under /dev/mapper/. Partitions are no longer mapped ('linked') to a physical disk, but to a RAID disk. Therefore, i would install GRUB under /dev/sdd/ , meaning the root of the RAID disk. – ipse lute Jun 18 '16 at 18:53
  • @ipselute Thank you for the answer! I have both an SSD drive (my C) and an HDD (my D drive). I'm kind of confused as to which one I should install on since I'm a complete newbie on linux/ubuntu. Also, does it matter on which disk my partition should be on? Thanks in advance! Edit: I also have files on my D drive (my HDD) which I don't want to lose access to from my Windows. – Bartu Jun 18 '16 at 20:35
  • As you can see, there are more Windows partitions than C and D. In Win10 there are a couple more Win-related partitions (microsoft-reserved, recovery, sometimes an OEM partition). Beside that there is an EFI partition (required on every EFI hardware). When you have a RAID unification, the SSD and the HDD space become one contiguous storage space. You can have a partition spanning from second half of SSD all the way to the first half of HDD (for example). Associating partitions to physical hardware is no longer relevant when using RAID. – ipse lute Jun 18 '16 at 22:30
  • Before installing Ubuntu, boot it in Live mode, open GParted and check the partition map. Don't delete EFI, ms-reserved and recovery partitions. Also find out what partition your Windows is installed (make sure you don't delete that either). Make a screenshot of GParted and put it in your question cause a can't tell which one is it. You could shrink your D drive, and create a swap and an ext partitions for your Ubuntu. It should make sense to install Ubuntu after Windows partition (for not moving Win). EFI(ESP) partition MUST always be first partition. – ipse lute Jun 18 '16 at 22:43

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This helped me install 16.04 on my msi CX61 2PC with Windows 10 installed: Installing Ubuntu Alongside a Pre-Installed Windows with UEFI

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