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I am trying to install Ubuntu 18.04 with GPT and RAID1 (mirroring) on 2 same size disks, with no other OS installed, but installation fails at GRUB. Is this an Ubuntu bug!? By default GRUB should install on both disks (sda&sdb), but the installer is failing to recognize the disks and throwing errors.

Ubuntu 18.04 partitions with RAID

Grub installation error on ubuntu18.04-GPT-RAID1

Note: I tried including the bios-grub partition into RAID but it didn't work, and same error.

Let me know any suggestion to resolve this issue.

Zanna
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root
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    Possible duplicate of [How to install Ubuntu 14.04/16.04 64-bit with a dual-boot RAID 1 partition on an UEFI/GPT system?](https://askubuntu.com/questions/660023/how-to-install-ubuntu-14-04-16-04-64-bit-with-a-dual-boot-raid-1-partition-on-an) – ThunderBird Mar 26 '19 at 10:46
  • @Yufenyuy Veyeh Dider, I am not looking for dual boot with windows, its just ubuntu only, and that's a lot of steps! for fixing a ubuntu bug!. – root Mar 27 '19 at 04:48

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RED FLAG

Simular issue here with secure boot enabled and dual boot with Ten (GPT), when clicking install Ubuntu, Ubiquity won't install Grud near the end and a fatal error occurs ending the install. Passing by Try Ubuntu works normally.

This bug has been present for more than a month in all flavors of DD (1709,19H1,20H1). Works normally when not dual boot. Bootline is tweaked with iommu=soft. With or without MOK Manager. The fatal error was sent twice via Ubiquity 3 weeks ago (Mate and U).

Mikemecanic
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