ubiquity Install stops with i/o error

[Phil Norbeck]

Install quits with an i/o error right after the partition section. The drive '/' is formatted ext4 correctly but errors when it starts to copy files. This has happened on my desktop and laptop with two different usb drives from different brands.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.9
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu22
Architecture: amd64
CasperVersion: 1.442
CurrentDesktop: ubuntu:GNOME
Date: Sat Apr 4 10:19:01 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed only-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Jean-Baptiste Lallement (jibel)]

Thanks for your report.

The installation media is corrupted
Apr 4 14:18:53 ubuntu kernel: [ 642.829814] SQUASHFS error: zlib decompression failed, data probably corrupt
Apr 4 14:18:53 ubuntu kernel: [ 642.829814] SQUASHFS error: squashfs_read_data failed to read block 0x37545

The system performs an integrity check on boot of the ISO. Did you see any error message when you booted the ISO?

[Launchpad Janitor (janitor)]

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