16.04 installer crash while copying files

[Franz M. Safar]

I tried to install the 16.04 beta to an ext4 partition from an USB stick and it crashed while copying files.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.46
ProcVersionSignature: Ubuntu 4.4.0-7.22-generic 4.4.2
Uname: Linux 4.4.0-7-generic x86_64
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
CasperVersion: 1.367
Date: Sat Mar 5 13:42:23 2016
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu-gnome.seed boot=casper quiet splash --- cdrom-detect/try-usb=true noprompt
LiveMediaBuild: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160225.1)
ProcEnviron:
 LANGUAGE=de_AT.UTF-8
 PATH=(custom, no user)
 LANG=de_AT.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Phillip Susi (psusi)]

Your installation medium is corrupt; you will need to recreate it and may want to verify it using the check disc option from the boot menu.

[Grant Dobbe (grant-dobbe)]

I just experienced the same problem. Checked the install disk for errors, and it found none.