[Bug 1315344] Re: Grub install failed on disks with software RAID

Helge Meinhard 1315344 at bugs.launchpad.net
Mon May 5 14:07:32 UTC 2014 

Here is the output of the command (run under Ubuntu 13.10 booted from
/dev/md0):

$ sudo mdadm -D /dev/md1
/dev/md1:
         Version : 1.2
   Creation Time : Wed Nov  6 16:18:54 2013
      Raid Level : raid1
      Array Size : 19514240 (18.61 GiB 19.98 GB)
   Used Dev Size : 19514240 (18.61 GiB 19.98 GB)
    Raid Devices : 2
   Total Devices : 2
     Persistence : Superblock is persistent

     Update Time : Mon May  5 07:37:31 2014
           State : clean
  Active Devices : 2
Working Devices : 2
  Failed Devices : 0
   Spare Devices : 0

            Name : <hostname>:1  (local to host <hostname>)
            UUID : 7d38852a:136668be:8d9f540b:7cfc4bcb
          Events : 33

     Number   Major   Minor   RaidDevice State
        0       8        2        0      active sync   /dev/sda2
        1       8       18        1      active sync   /dev/sdb2

$ sudo grub-probe -v -d /dev/md1
grub-probe: info: cannot open `/boot/grub/device.map': No such file or directory.
grub-probe: info: changing current directory to /dev.
grub-probe: info: changing current directory to vboxusb.
grub-probe: info: changing current directory to 001.
grub-probe: info: changing current directory to 003.
grub-probe: info: changing current directory to dri.
grub-probe: info: changing current directory to snd.
grub-probe: info: changing current directory to by-path.
grub-probe: info: changing current directory to cpu.
grub-probe: info: changing current directory to md.
grub-probe: info: changing current directory to disk.
grub-probe: info: changing current directory to by-uuid.
grub-probe: info: changing current directory to by-id.
grub-probe: info: changing current directory to /dev.
grub-probe: info: changing current directory to vboxusb.
grub-probe: info: changing current directory to 001.
grub-probe: info: changing current directory to 003.
grub-probe: info: changing current directory to dri.
grub-probe: info: changing current directory to snd.
grub-probe: info: changing current directory to by-path.
grub-probe: info: changing current directory to cpu.
grub-probe: info: changing current directory to md.
grub-probe: info: changing current directory to disk.
grub-probe: info: changing current directory to by-uuid.
grub-probe: info: changing current directory to by-id.
grub-probe: info: Looking for /dev/sda2.
grub-probe: info: /dev/sda is a parent of /dev/sda2.
grub-probe: info: /dev/sda2 starts from 39063552.
grub-probe: info: opening the device hostdisk//dev/sda.
grub-probe: info: the size of hostdisk//dev/sda is 3907029168.
grub-probe: info: the size of hostdisk//dev/sda is 3907029168.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub-probe: info: scanning hostdisk//dev/sda for LDM.
grub-probe: info: no LDM signature found.
grub-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub-probe: info: no LVM signature found.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub-probe: info: Found array md/0.
grub-probe: info: Inserting hostdisk//dev/sda into md/0 (mdraid1x)
.
grub-probe: info: the size of hostdisk//dev/sda is 3907029168.
grub-probe: info: Scanning for DISKFILTER devices on disk md/0.
grub-probe: info: Scanning for mdraid1x devices on disk md/0.
grub-probe: info: Scanning for mdraid09 devices on disk md/0.
grub-probe: info: Scanning for mdraid09_be devices on disk md/0.
grub-probe: info: Scanning for dmraid_nv devices on disk md/0.
grub-probe: info: Scanning for ldm devices on disk md/0.
grub-probe: info: scanning md/0 for LDM.
grub-probe: info: no LDM signature found.
grub-probe: info: Scanning for lvm devices on disk md/0.
grub-probe: info: no LVM signature found.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub-probe: info: Found array md/1.
grub-probe: info: Inserting hostdisk//dev/sda into md/1 (mdraid1x)
.
grub-probe: info: the size of hostdisk//dev/sda is 3907029168.
grub-probe: info: Scanning for DISKFILTER devices on disk md/1.
grub-probe: info: Scanning for mdraid1x devices on disk md/1.
grub-probe: info: Scanning for mdraid09 devices on disk md/1.
grub-probe: info: Scanning for mdraid09_be devices on disk md/1.
grub-probe: info: Scanning for dmraid_nv devices on disk md/1.
grub-probe: info: Scanning for ldm devices on disk md/1.
grub-probe: info: scanning md/1 for LDM.
grub-probe: info: no LDM signature found.
grub-probe: info: Scanning for lvm devices on disk md/1.
grub-probe: info: no LVM signature found.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub-probe: info: scanning hostdisk//dev/sda for LDM.
grub-probe: info: no LDM signature found.
grub-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub-probe: info: no LVM signature found.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub-probe: info: Found array md/2.
grub-probe: info: Inserting hostdisk//dev/sda into md/2 (mdraid1x)
.
grub-probe: info: the size of hostdisk//dev/sda is 3907029168.
grub-probe: info: Scanning for DISKFILTER devices on disk md/2.
grub-probe: info: Scanning for mdraid1x devices on disk md/2.
grub-probe: info: Scanning for mdraid09 devices on disk md/2.
grub-probe: info: Scanning for mdraid09_be devices on disk md/2.
grub-probe: info: Scanning for dmraid_nv devices on disk md/2.
grub-probe: info: Scanning for ldm devices on disk md/2.
grub-probe: info: scanning md/2 for LDM.
grub-probe: info: no LDM signature found.
grub-probe: info: Scanning for lvm devices on disk md/2.
grub-probe: info: no LVM signature found.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub-probe: info: Found array md/3.
grub-probe: info: Inserting hostdisk//dev/sda into md/3 (mdraid1x)
.
grub-probe: info: the size of hostdisk//dev/sda is 3907029168.
grub-probe: info: Scanning for DISKFILTER devices on disk md/3.
grub-probe: info: Scanning for mdraid1x devices on disk md/3.
grub-probe: info: Scanning for mdraid09 devices on disk md/3.
grub-probe: info: Scanning for mdraid09_be devices on disk md/3.
grub-probe: info: Scanning for dmraid_nv devices on disk md/3.
grub-probe: info: Scanning for ldm devices on disk md/3.
grub-probe: info: scanning md/3 for LDM.
grub-probe: info: no LDM signature found.
grub-probe: info: Scanning for lvm devices on disk md/3.
grub-probe: info: no LVM signature found.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub-probe: info: Found array md/4.
grub-probe: info: Inserting hostdisk//dev/sda into md/4 (mdraid1x)
.
grub-probe: info: the size of hostdisk//dev/sda is 3907029168.
grub-probe: info: Scanning for DISKFILTER devices on disk md/4.
grub-probe: info: Scanning for mdraid1x devices on disk md/4.
grub-probe: info: Scanning for mdraid09 devices on disk md/4.
grub-probe: info: Scanning for mdraid09_be devices on disk md/4.
grub-probe: info: Scanning for dmraid_nv devices on disk md/4.
grub-probe: info: Scanning for ldm devices on disk md/4.
grub-probe: info: scanning md/4 for LDM.
grub-probe: info: no LDM signature found.
grub-probe: info: Scanning for lvm devices on disk md/4.
grub-probe: info: no LVM signature found.
grub-probe: info: Partition 0 starts from 2048.
grub-probe: info: Partition 1 starts from 39063552.
grub-probe: info: Looking for /dev/sdb2.
grub-probe: info: /dev/sdb is a parent of /dev/sdb2.
grub-probe: info: /dev/sdb2 starts from 39063552.
grub-probe: info: opening the device hostdisk//dev/sdb.
grub-probe: info: the size of hostdisk//dev/sdb is 3907029168.
grub-probe: info: the size of hostdisk//dev/sdb is 3907029168.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for ldm devices on disk hostdisk//dev/sdb.
grub-probe: info: scanning hostdisk//dev/sdb for LDM.
grub-probe: info: no LDM signature found.
grub-probe: info: Scanning for lvm devices on disk hostdisk//dev/sdb.
grub-probe: info: no LVM signature found.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sdb.
grub-probe: info: Inserting hostdisk//dev/sdb into md/0 (mdraid1x)
.
grub-probe: info: the size of hostdisk//dev/sdb is 3907029168.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sdb.
grub-probe: info: Inserting hostdisk//dev/sdb into md/1 (mdraid1x)
.
grub-probe: info: the size of hostdisk//dev/sdb is 3907029168.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for ldm devices on disk hostdisk//dev/sdb.
grub-probe: info: scanning hostdisk//dev/sdb for LDM.
grub-probe: info: no LDM signature found.
grub-probe: info: Scanning for lvm devices on disk hostdisk//dev/sdb.
grub-probe: info: no LVM signature found.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sdb.
grub-probe: info: Inserting hostdisk//dev/sdb into md/2 (mdraid1x)
.
grub-probe: info: the size of hostdisk//dev/sdb is 3907029168.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sdb.
grub-probe: info: Inserting hostdisk//dev/sdb into md/3 (mdraid1x)
.
grub-probe: info: the size of hostdisk//dev/sdb is 3907029168.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sdb.
grub-probe: info: Inserting hostdisk//dev/sdb into md/4 (mdraid1x)
.
grub-probe: info: the size of hostdisk//dev/sdb is 3907029168.
grub-probe: info: Partition 0 starts from 2048.
grub-probe: info: Partition 1 starts from 39063552.
grub-probe: info: changing current directory to /dev.
grub-probe: info: changing current directory to vboxusb.
grub-probe: info: changing current directory to 001.
grub-probe: info: changing current directory to 003.
grub-probe: info: changing current directory to dri.
grub-probe: info: changing current directory to snd.
grub-probe: info: changing current directory to by-path.
grub-probe: info: changing current directory to cpu.
grub-probe: info: changing current directory to md.
grub-probe: info: changing current directory to disk.
grub-probe: info: changing current directory to by-uuid.
grub-probe: info: changing current directory to by-id.
grub-probe: info: changing current directory to /dev.
grub-probe: info: changing current directory to vboxusb.
grub-probe: info: changing current directory to 001.
grub-probe: info: changing current directory to 003.
grub-probe: info: changing current directory to dri.
grub-probe: info: changing current directory to snd.
grub-probe: info: changing current directory to by-path.
grub-probe: info: changing current directory to cpu.
grub-probe: info: changing current directory to md.
grub-probe: info: changing current directory to disk.
grub-probe: info: changing current directory to by-uuid.
grub-probe: info: changing current directory to by-id.
grub-probe: info: Looking for /dev/sda2.
grub-probe: info: /dev/sda is a parent of /dev/sda2.
grub-probe: info: /dev/sda2 starts from 39063552.
grub-probe: info: opening the device hostdisk//dev/sda.
grub-probe: info: the size of hostdisk//dev/sda is 3907029168.
grub-probe: info: the size of hostdisk//dev/sda is 3907029168.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub-probe: info: scanning hostdisk//dev/sda for LDM.
grub-probe: info: no LDM signature found.
grub-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub-probe: info: no LVM signature found.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub-probe: info: scanning hostdisk//dev/sda for LDM.
grub-probe: info: no LDM signature found.
grub-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub-probe: info: no LVM signature found.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub-probe: info: Partition 0 starts from 2048.
grub-probe: info: Partition 1 starts from 39063552.
grub-probe: info: Looking for /dev/sdb2.
grub-probe: info: /dev/sdb is a parent of /dev/sdb2.
grub-probe: info: /dev/sdb2 starts from 39063552.
grub-probe: info: opening the device hostdisk//dev/sdb.
grub-probe: info: the size of hostdisk//dev/sdb is 3907029168.
grub-probe: info: the size of hostdisk//dev/sdb is 3907029168.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for ldm devices on disk hostdisk//dev/sdb.
grub-probe: info: scanning hostdisk//dev/sdb for LDM.
grub-probe: info: no LDM signature found.
grub-probe: info: Scanning for lvm devices on disk hostdisk//dev/sdb.
grub-probe: info: no LVM signature found.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for ldm devices on disk hostdisk//dev/sdb.
grub-probe: info: scanning hostdisk//dev/sdb for LDM.
grub-probe: info: no LDM signature found.
grub-probe: info: Scanning for lvm devices on disk hostdisk//dev/sdb.
grub-probe: info: no LVM signature found.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sdb.
grub-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sdb.
grub-probe: info: Partition 0 starts from 2048.
grub-probe: info: Partition 1 starts from 39063552.
grub-probe: info: opening mduuid/7d38852a136668be8d9f540b7cfc4bcb.
ext2

-- 
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https://bugs.launchpad.net/bugs/1315344

Title:
  Grub install failed on disks with software RAID

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

Bug description:
  I've got two 2TB drives set up with identical partitions, which are combined into RAID1 arrays (five mirrors across the two disks).
  On a free RAID1 I've installed Trusty 64bit from the Desktop installer ("try Ubuntu" first, install mdadm, run mdadm --assemble --scan, then start installer). I then wanted grub to be installed onto /dev/sda and /dev/sdb, but both fail.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubiquity 2.18.7
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  CasperVersion: 1.340
  Date: Fri May  2 13:05:29 2014
  InstallCmdLine: noprompt cdrom-detect/try-usb=true file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
  LiveMediaBuild: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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