install fails with Grub install

[Dave Martin]

Using live mode to install to RAID5 fails. First error brought me to select the volume (there is only one) and still failed to install.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: ubiquity 2.21.25
ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
Uname: Linux 3.19.0-15-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CasperVersion: 1.360
Date: Mon Jun 29 23:04:54 2015
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper cdrom-detect/try-usb=true noprompt floppy.allowed_drive_mask=0 ignore_uuid initrd=/casper/initrd.lz quiet splash --- BOOT_IMAGE=/casper/vmlinuz.efi
LiveMediaBuild: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
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)]

You are using a fake raid controller. You should avoid this and stick with linux software raid unless you have to dual boot with windows. If you are going to use it, then you need to install grub to the fake raid device ( /dev/mapper/isw_ddcjefaac_Volume0 ) rather than an individual disk ( /dev/sda )