Ubiquity grub-install fails when installing to a RAID10 with manual partitioning

[Peter Cordes]

edit: derp, of course this fails, mdadm isn't installed until you chroot in and do that manually. I wasn't thinking when I reported this >.<. See http://askubuntu.com/questions/505446/how-to-install-ubuntu-14-04-with-raid-1-using-desktop-installer for details on how to go in manually, in case anyone's search took them here.

This is probably a duplicate of something.

Ubiquity running from Kubuntu 15.04 beta2 usb image.

The installer GUI said it was going to try installing GRUB on sda, not sda1. (This isn't a duplicate of #1322182)

my setup is:
/ on XFS on /dev/md0: RAID10 of sda2,sdb2,sdc2
/home on XFS on a different md RAID10 of sda3,sdb3,sdc3
/var/tmp on XFS on a different md RAID0 of sda4,sdb4,sdc4
/f on XFS on a different md RAID5 of sda6,sdb6,sdc6,sdd (yes, whole sdd, it's an old 2.5TB, others are new 3TB)

To get Ubiquity to install with the root fs on md0, rather than partitioning md0, I had to mkfs /dev/md0. (Which is fine, because I wanted to use custom mkfs.xfs options anyway.)

I know this setup is viable because I had it working after a manual rsync / chroot / grub-install to get my 14.10 system onto this RAID setup. I'm only using the installer (kubuntu 15.04 beta2) because I've been having some weird crashes, and want to get rid of any cruft that might have built up over the course of continuous upgrades from Ubuntu 7.04.

Also, it would be nice if the installer gave the option to grub-install onto ALL your disks, not just sda. In a raid setup, you want all your disks to be bootable in case one dies but your essential filesystems are only degraded, not lost. Even in a non-raid setup, it's potentially useful if you aren't sure the BIOS detects your disks in the same order as Linux.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: ubiquity 2.21.17 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2
Uname: Linux 3.19.0-10-generic x86_64
ApportVersion: 2.16.2-0ubuntu4
Architecture: amd64
CasperVersion: 1.356
CurrentDesktop: KDE
Date: Thu Apr 16 15:03:02 2015
InstallCmdLine: file=/cdrom/preseed/kubuntu.seed boot=casper maybe-ubiquity initrd=/casper/initrd.lz quiet splash ---
LiveMediaBuild: Kubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150326)
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[Simon Quigley (tsimonq2)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to look at all reported bugs in a timely manner. There have been many changes in Ubuntu since that time you reported the bug and your problem may have been fixed with some of the updates. It would help us a lot if you could test it on a currently supported Ubuntu version. If you test it and it is still an issue, kindly upload the updated logs by running only once:
apport-collect 1445156

and any other logs that are relevant for this particular issue.

[Launchpad Janitor (janitor)]

[Expired for ubiquity (Ubuntu) because there has been no activity for 60 days.]