grub won't install on md0 (raid0)

[Paul Dee]

Created 3 arrays using cfdisk and mdadm
md0 -> raid0 -> /
md1 -> raid0 -> /var
md2 -> raid1 -> /home

Chose grub to be installed on /dev/md0

Installation goes fine until the end when it fails with an error that grub can't be installed and system will be unbootable. Installer then just crashes.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CasperVersion: 1.376
Date: Thu Sep 1 01:33:26 2016
InstallCmdLine: BOOT_IMAGE=(loop)/casper/vmlinuz.efi root=UUID=C2D2-7CD6 maybe-ubiquity debian-installer/language=en keyboard-configuration/layoutcode=us iso-scan/filename=/ubuntu-16.04-desktop-amd64.iso boot=casper file=/cdrom/preseed/ubuntu.seed noprompt quiet splash --
LiveMediaBuild: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
ProcEnviron:
 LANGUAGE=en_CA.UTF-8
 PATH=(custom, no user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[Phillip Susi (psusi)]

The bios does not know about raid so grub can not be installed on one. It must be installed on one or more bare disks.