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I have a Linux Mint 17.1 Partition at /dev/sda1 and another Mint 17.1 Partition at /dev/sda5. How do I set the MBR to boot into /dev/sda1 instead of the GRUB menu? I know how to use GParted to delete the /dev/sda5 partition but not how to set the MBR.

  • the MBR cannot boot into sda5 as it does not know about extended partitions. You need grub or another boot loader for that. Just make sure /dev/sda1 has the boot flag and sda1 should boot – VaTo Jun 5 '15 at 21:38
  • I have /dev/sda1 with a boot flag, it still boots into GRUB. – Chase Cromwell Jun 5 '15 at 21:45
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Grub is a piece of software that is installed in the MBR.

Delete sda5 and run grub-update or change grub config manually to boot from sda1, Maybe this howto can help you.

http://www.techsupportforum.com/357-how-to-configure-grub-bootloader-in-mint-linuxubuntu/

If grub is installed on sda u can change the grub config to boot from sda1. If not try to install grub on sda.

$sudo grub-install /dev/sda
$sudo update-grub

If grub-install gives problems, you can install manually from the Grub shell with:

  1. grub
  2. root (hd0,0)
  3. setup (hd0)
  4. quit

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