Cannot install grub

[Akira Nakagawa]

I cannot install grub to /dev/sdb

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ubiquity 2.10.29
ProcVersionSignature: Ubuntu 3.11.0-15.25~precise1-generic 3.11.10
Uname: Linux 3.11.0-15-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
CasperVersion: 1.315.1
Date: Sat Apr 5 15:32:26 2014
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Ubuntu 12.04.4 LTS "Precise Pangolin" - Release amd64 (20140204)
MarkForUpload: True
ProcEnviron:
 LANGUAGE=ja_JP.UTF-8
 TERM=linux
 PATH=(custom, no user)
 LANG=ja_JP.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[Phillip Susi (psusi)]

You initially tried to install to /dev/sda, which failed. Due to another known bug, after the first try fails, all subsequent attempts will also fail, so please try to install again and be sure to use /dev/sdb the first time.

[Launchpad Janitor (janitor)]

[Expired for grub-installer (Ubuntu) because there has been no activity for 60 days.]