Please run 'sudo grub-install -v" from the live image; we should have a look at the full debug output to see why md126,1 isn't found.
That said, typically RAIDs are installed by installing grub to each member separately; which is handled by grub-installer. You don't run through these steps when doing an install on desktop, which isn't set up to support RAID. ** Changed in: grub-installer (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1792883 Title: "grub-install: error: disk `md126,1' not found." for Intel VROC arrays in mdadm To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1792883/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs