[Bug 1723633] Re: Can't install to md RAID1 in EFI mode

[Tony Travis]

On 13/11/17 17:32, Phillip Susi wrote:
> I noticed that you have partitioned the raid array, which is unusual.
> Can you try using just /dev/md0 for / with no partition table on it?

Hi, Philip.

I've used the same method of installing to a partitioned "md" RAID for
many years on non-EFI 'legacy' systems, or on systems with EFI disabled
and I've not had any problems doing the steps manually. The problem was
that the installer crashed when it tried to install GRUB to multiple
disks that were RAID members. After the installer crashed, I just did
the GRUB installation manually without any problems.

All "md" RAIDs are partitionable since the 2.6 Linux kernel. The Debian
installer and Ubuntu 'alternative' installer both insist on creating
separate RAIDs for each filesystem, when installing to RAID. However,
this makes subsequent management of an instance much more complicated
because all of the RAIDs need to be stopped etc. before a drive can be
removed/replaced. This is a single operation using a partitioned RAID.

I don't believe it's at all unusual to partition "md" RAIDs, and it
might be awkward to boot off a disk unless the RAID is created from
partitions anyway. Indeed, you are warned about this when creating an
"md" RAID, but I'll give it a try and let you know how I get on :-)

Bye,

  Tony.

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You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/1723633

Title:
  Can't install to md RAID1 in EFI mode

Status in grub-installer package in Ubuntu:
  Incomplete

Bug description:
  EFI install to md RAID1 with separate FAT32 /boot/efi partition

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.63.4
  ProcVersionSignature: Ubuntu 4.10.0-28.32~16.04.2-generic 4.10.17
  Uname: Linux 4.10.0-28-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.10
  Architecture: amd64
  CasperVersion: 1.376.2
  Date: Sat Oct 14 18:33:44 2017
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu-mate.seed boot=casper quiet splash ---
  LiveMediaBuild: Ubuntu-MATE 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
  ProcEnviron:
   LANGUAGE=en_GB.UTF-8
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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