grub-install/dev/sda failed

[Abhishek Sinha]

I am installing Ubuntu 16.04.3 LTS from a bootable usb I created. It works fine when I just try Ubuntu. Although sometimes it is unable to mount my HDD. When I try to install it by replacing previously installed Windows 7 it returns a fatal error with message that grub-install/dev/sda failed. As of now there is no active OS in my system and the error remains the same.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63.4 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 4.10.0-28.32~16.04.2-generic 4.10.17
Uname: Linux 4.10.0-28-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
CasperVersion: 1.376.2
Date: Sun Nov 19 13:05:01 2017
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash --- maybe-ubiquity
LiveMediaBuild: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
ProcEnviron:
 LANGUAGE=en_IN
 PATH=(custom, no user)
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[Phillip Susi (psusi)]

Your hard disk is failing and will need to be replaced.