Windows 10: Where would I put GRUB for a dual boot?

  1.    04 May 2016 #1

    Where would I put GRUB for a dual boot?


    Yes, I know this question belongs in the kali linux forum. Here it is there:
    https://forums.kali.org/showthread.p...e-does-GRUB-go
    This forum is just way more helpful.
    ////
    I am trying to do a dual boot on windows 10 with a Gateway NE56R49U laptop.
    My partitions are in the following picture: [ ext4 is where Kali is going]
    http://imgur.com/B7gAo3v

    Which partition do I install GRUB to?
    ie: (/dev/sda)

    Do I have to do anything to get it to boot correctly since linux requires Legacy Bios and Windows requires UEFI? If so, what? If I wanted to install Ubuntu, should I do that first and then install Kali? Would that make this easier for me?

    I appreciate all the help I can get.
    Thanks.
      My ComputerSystem Spec

  2.    05 May 2016 #2

    It depends which bootloader you want to use. Personally, I use Grub, specifically Burg - this is what it looks like:

    Click image for larger version. 

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    I have Mint and Windows on my SSD (dev/sda) - which has Grub in that MBR.

    Recently I messed with the partitions on my second HDD (dev/sdb) and lost Windows boot - Grub's osprober found windows OK but windows still would not boot
    Macruim Reflect's "fix Windows boot" only managed to overwrite Grub, but the boot error persisted.
    The way I fixed it was re-installing Grub from Live, then running diskpart from the Win install media to get the system and windows drive letters - ran chkdsk /f /r on both those - came out clean - what fixed it was bcdboot [windows drive letter]:/windows.

    Just relaying my experience as something to bear in mind when setting yours up.
      My ComputerSystem Spec


  3. Posts : 3,506
    Win_8.1-Pro, Win_10.1607-Pro, Mint_17.3
       05 May 2016 #3

    Superfly said: View Post
    It depends which bootloader you want to use.
    And which OS you consider primary, I suppose.

    I took the non-conventional approach.
    This is on a MBR / BIOS machine
    - Win8.1 primary, Win10 as 2nd OS, Linux Mint as 3rd OS

    I GParted two separate partitions (ext4 & linux-swap) before installing Linux Mint
    I had to tell the installation to use the ext4 part (it was flagged "do not use") - set it to use ext4 journalling
    I selected the ext4 part for the install and set the mount point as / on that part
    (be careful - the install seems to want to use to sda. just change it to your ext4 sda ... sda6 in your pic)

    edit+
    Make sure to remove the the Boot flag from the ext4 part if present
    I used unallocated space in the extended partition for both Linux parts (as logical parts)
    edit-

    I don't see a linux-swap part in your pic.
    I'm not certain, but suggest that you create a small part in GParted with a type linux-swap
    I used 1024 and it seems fine

    Then you have to tell Bootmgr about Grub- I used EasyBCD
    Pick the Linux OS tab
    Point to the ext4 part

    The advantage?
    Each OS leaves the other boot alone - sure you might have to reconfigure Bootmgr to know about Grub after an update from MS, but you should always be able to boot to Windows.

    edit+
    Superfly's post below led me to this: Dual boot Windows 7 and Linux/UNIX (also MBR / BIOS information.
    Unix BSD descendants need a primary partition. Linux descendants can be installed to logical partitions.
    edit-
    Last edited by Slartybart; 06 May 2016 at 15:09.
      My ComputerSystem Spec

  4.    06 May 2016 #4

    Thanx Bill,

    The other thing is... for adding Linux boot to the Windows Bootmgr in UEFI, try BootNext tool - boot any Linux or Windows from Windows 8.1/7/Vista - I don't think there is a need for legacy mode.
      My ComputerSystem Spec


  5. Posts : 3,506
    Win_8.1-Pro, Win_10.1607-Pro, Mint_17.3
       06 May 2016 #5

    Thank you Superfly,

    I wasn't sure about UEFI ... I added an MBR disclaimer in my post.

    Superfly said: View Post
    I don't think there is a need for legacy mode.
    You're talking about legacy mode for Linux, yes?
    I agree.
    Last edited by Slartybart; 06 May 2016 at 15:12.
      My ComputerSystem Spec


 

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