[Bug 1458788] Re: Kubuntu 15.04 installation fails with grub-install error on raid 0 system

[Chris Vanden Berghe]

Hi Phillip,

After 20+ attempts with various configurations I gave up and left
/dev/sda out of the raid array (i.e., /dev/sda as / and /dev/md0 as
/home). I have just finished my reinstall and so I'm afraid I no longer
have access to the requested logs. Maybe somebody else experiencing the
same issue in the future will be able to provide the additional info.

A quick aside, even after removing /dev/sda from the raid array and
using manual partitioning the system the installation was far from
smooth. The installer correctly added

# /home was on /dev/md0 during installation
UUID=fe8c429c-1700-4210-aa76-3dd8d5fd91aa /home           ext4    defaults        0       2

to /etc/fstab but didn't install the mdadm package. As a result the
system hung on reboot.

Chris.

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https://bugs.launchpad.net/bugs/1458788

Title:
  Kubuntu 15.04 installation fails with grub-install error on raid 0
  system

Status in grub-installer package in Ubuntu:
  Incomplete

Bug description:
  I have tried installing Kubuntu 15.04 on my laptop containing 4 SSDs
  which I want to combine using raid 0.

  I performed the following steps:

  - boot from USB
  - choose try Kubuntu
  - install mdadm
  - create raid 0 array
  - start installation
  - whole disk, guided partitioning

  The installation fails with "Executing 'grub-install /dev/sda'
  failed".

  I tried the following alternatives without luck:

  - dist-upgrade before installation
  - using Kubuntu 14.04.02 instead of 15.04
  - manual partitioning
  - using LVM w or w/o encryption
  - pre-creating swap/ext4 partitions vs. partitioning during installation
  - adding --metadata=0.90 to mdadm

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