[Bug 1164831] Re: Installing on MSI motherboard 870U-G55 with fake raid controller. One 1.2TB and one 2.8TB Raid partition. Installed to 1.2TB. Failed to install boot loader. Critical error.er

[Phillip Susi]

mdadm volumes can be shared between multiple linux installs no
differently than regular disk partitions.  When installing to a
fakeraid, you must install grub to the raid device, which in your case
is /dev/mapper/pdc_chdhbbcagj, rather than an individual disk ( /dev/sda
).


** Changed in: grub-installer (Ubuntu)
       Status: New => Invalid

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Title:
  Installing on MSI motherboard 870U-G55 with fake raid controller. One
  1.2TB and one 2.8TB Raid partition. Installed to 1.2TB. Failed to
  install boot loader. Critical error.er

Status in “grub-installer” package in Ubuntu:
  Invalid

Bug description:
  There is VERY poor documentation as to how to accomplish such things
  in Ubuntu. I could not even find a definitive answer as to whether one
  Linux install can share a mdadm created partition and the accompanying
  data with a second one. It appears to not be possible, which is why I
  wanted to go back to my fake raid.

  I get that it is not Ubuntu's fault that my hardware isn't configged
  to work with it, but it is the software's fault that the softraid
  solution offered can't support a data partition to be accessed by
  several installs.

  Linux-Secure-Remix 12.10 28feb2013

  Terminal reports:
   "~$ apt-cache policy pkgname
  N: Unable to locate package pkgname"

  I expected Ubuntu to see my fake RAID partition and install to it
  properly.

  Instead the install reported a fatal error.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: ubiquity 2.12.16
  ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
  Uname: Linux 3.5.0-17-generic x86_64
  ApportVersion: 2.6.1-0ubuntu3
  Architecture: amd64
  CasperVersion: 1.328
  Date: Thu Apr  4 22:12:09 2013
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
  LiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  ProcEnviron:
   TERM=unknown
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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