I am trying to install onto an ASUS system with an LSI (fake) raid controller. Unlike debian, ubuntu 14 detected it and installed drivers and utilities. Then it creates a RAID 1 as directed. All is well.

But it fails to install a boot loader, grub or lilo. No error details, just "failed to install". So sad. I tried to create a partition for /boot and not have it be part of the RAID but it fails.

How do I install a boot loader onto a RAID?


The installer should default to the correct location, but if not, make sure it is set to install grub to the whole array ( /dev/mapper/something on older editions of Ubuntu, /dev/mdXX on recent releases if you have an Intel fakeraid ) rather than an individual drive ( /dev/sda ).

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  • Thank you. boot-repair installed it into "/dev/mapper/something" – jnajna Jul 16 '15 at 16:43
  • The boot loader installer failed. I was not trying to do it manually. – jnajna Jul 16 '15 at 20:45

This should be done automatically at the end of the Ubuntu server/desktop install. See this guide - Official Ubuntu Guides

On my server, the boot loader got installed on both the HDD's directly (Raid1). If that fails, you can run this command for both your hard drives:

  • grub-install /dev/sdX

X: is the letter of hard drives.

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  • grub install fails – jnajna Jul 15 '15 at 21:15
  • can you give more details on the error you are getting? Are you sure this is a software raid controller (or something that's embedded into the motherboard, but is para hardware)? Did you try creating a pure software raid directly in Ubuntu (ignoring the ASUS raid option)? – Jeets Jul 15 '15 at 21:20
  • Official guide links to very old fake RAID guide: help.ubuntu.com/community/FakeRaidHowto – jnajna Jul 15 '15 at 22:24
  • grub-install: not found – jnajna Jul 15 '15 at 23:46
  • Unable to install GRUB on /dev/md126p1 – jnajna Jul 15 '15 at 23:48

I am going to try boot-repair.

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  • This worked. I followed the prompts and ran several commands as directed. – jnajna Jul 16 '15 at 0:16

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