[Bug 1578943] Re: when I select /dev/sdb to install grub when /dev/sda fails, still error, /dev/sdb is ok

[iugamarian]

root at ubuntu-mate:/# update-grub
Generating grub configuration file ...
Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported.
Found linux image: /boot/vmlinuz-4.4.0-21-generic
Found initrd image: /boot/initrd.img-4.4.0-21-generic
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
grub-probe: error: cannot find a GRUB drive for /dev/sda4.  Check your device.map.
grub-probe: error: cannot find a GRUB drive for /dev/sdc1.  Check your device.map.
Found Windows 7 (loader) on /dev/sdb1
done
root at ubuntu-mate:/#

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https://bugs.launchpad.net/bugs/1578943

Title:
  when I select /dev/sdb to install grub when /dev/sda fails, still
  error, /dev/sdb is ok

Status in grub-installer package in Ubuntu:
  New

Bug description:
  Windows 7 with strange partition layout on /dev/sda, Ubuntu 15.10 sees it but Ubuntu 16.04 des not see it. /dev/sdb seems to have normal partition layout. Found on Google how to install grub manually:
  http://howtoubuntu.org/how-to-repair-restore-reinstall-grub-2-with-a-ubuntu-live-cd

  When selecting /dev/sdb I think it still is /dev/sda in the script
  variable.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.63 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  CasperVersion: 1.376
  Date: Fri May  6 09:54:13 2016
  InstallCmdLine: file=/cdrom/preseed/ubuntu-mate.seed boot=casper initrd=/casper/initrd.lz quiet splash --- maybe-ubiquity
  LiveMediaBuild: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  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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