Grub installation failure on Dell Vostro 5470 (USB disk)

[Haima]

Dear Community firends,

(Sorry My Engish very bad)

Hello, Today, I try Install Ubuntu 20.10,but due this error, I tried about 10 times and the problem still exists.

I don't know where the problem is. Since I entered the page through the system pop-up after the installer crashed, I don't know the specific technical details.

And the program does not provide an option to obtain logs, so this problem seems not easy to solve.

Is there any way I can get things like logs that can help with investigations?

Regrads

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: ubiquity 20.10.13
ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
Uname: Linux 5.8.0-25-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu50
Architecture: amd64
CasperMD5CheckResult: skip
CasperVersion: 1.455
CurrentDesktop: ubuntu:GNOME
Date: Tue May 25 17:06:06 2021
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed only-ubiquity oem-config/enable=true quiet splash ---
LiveMediaBuild: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
ProcEnviron:
 LANGUAGE=zh_CN.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=zh_CN.UTF-8
 LC_NUMERIC=C.UTF-8
RebootRequiredPkgs:
 linux-image-5.8.0-25-generic
 linux-base
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[Haima (haima174)]

About OEM Install Flag:

No matter the flag is true or false, it will not affect the result of installation failure.