grub installation fetal error

[Pallaw Abhishek]

not able to install bionic beaver due to grub error ..

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CasperVersion: 1.394
Date: Sun May 13 14:41:36 2018
InstallCmdLine: initrd=/casper/initrd.lz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash --- BOOT_IMAGE=/casper/vmlinuz
LiveMediaBuild: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[dino99 (9d9)]

Looks like a corrupted support used. Lot of "Error retrieving chunk extents: Operation not supported" logged.

First check the iso's md5sum, then how that iso has been burnt (maybe too quickly).
http://releases.ubuntu.com/18.04/
https://help.ubuntu.com/community/BurningIsoHowto

Indeed, if you can use an usb stick for installation, its a better solution.
https://www.makeuseof.com/tag/install-ubuntu-computer-using-usb-flash-drive/

[Phillip Susi (psusi)]

Your hard disk is failing and will need replaced.