Hi I am trying to install Ubuntu on my new laptop, MSI GP62 6QF. It has Windows 10 installed on the 128 GB SSD. Now I want to install Ubuntu on the 1TB HDD. I booted into Ubuntu Live CD using a USB drive. I have choosen the following partitions for installation(I haven't made any change to SSD's partitions).

128 GB SSD Partitions:

/dev/sd1 efi ------------ Windows Boot Manager
/dev/sd3 ntfs 126GB
/dev/sd4 ntfs 1GB

1TB HDD Partitions:

/dev/sdb1 ntfs   300GB
/dev/sdb2 ntfs   300GB
/dev/sdb4 swap   4096 MB
/dev/sdb5 ext4 / 300GB
/dev/sdb3 ntfs   17GB (system recovery)

/dev/sdb4 and /dev/sdb5 partitions were created by me.

What I am confused about is what option should I select in "Device for boot Loader installation"? /dev/sda or /dev/sdb

  • sda is where the EFI partition resides. You should boot Ubuntu in UEFI mode.
    – user589808
    Nov 19, 2016 at 19:26
  • actually live cd automatically boot into the EFI mode. i didn't had to do anything
    – bytestorm
    Nov 19, 2016 at 19:49

1 Answer 1


The bootloader for your Windows is on SSD. While installing Ubuntu, you should select HDD for bootloader I think. This way, your windows bootloader will not get affected and you will be able to boot into any OS just be selecting the boot drive at boot.

  • Thanks for the answer.. I did tried that earlier but with no luck.. I had finally given up on installing ubuntu on this pc.
    – bytestorm
    Apr 2, 2017 at 6:53

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