grub-install /dev/sda

[Bill]

Another fresh install after wiping the hard disk
Same error (grub-install) fatal

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: ubiquity 20.10.10
ProcVersionSignature: Ubuntu 5.8.0-22.23-generic 5.8.14
Uname: Linux 5.8.0-22-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu50
Architecture: amd64
CasperMD5CheckMismatches: ./pool/main/g/gcc-10/libtsan0_10.2.0-13ubuntu1_amd64.deb
CasperMD5CheckResult: skip
CasperVersion: 1.452
CurrentDesktop: ubuntu:GNOME
Date: Wed Oct 14 10:42:21 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 20.10 "Groovy Gorilla" - Beta amd64 (20201014)
ProcEnviron:
 LANGUAGE=en_CA.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_CA.UTF-8
 LC_NUMERIC=C.UTF-8
RebootRequiredPkgs:
 linux-image-5.8.0-23-generic
 linux-base
 linux-image-5.8.0-22-generic
 linux-base
 linux-base
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Paul White (paulw2u)]

From the bug description:

CasperMD5CheckMismatches: ./pool/main/g/gcc-10/libtsan0_10.2.0-13ubuntu1_amd64.deb
CasperMD5CheckResult: skip

It's possible you had a bad write to your media or for some other reason its contents could not be read correctly. Please always allow the integrity check to complete so that any errors can be displayed.

Closing as "Invalid" due to the time that elapsed since this issue was reported.