OK, looks like I had two ISO files all the time. One of them fails MD5 check, so perhaps that was the one Startup Disk Creator kept writing to the USB drives. Apparently mistakes start happening after 2 weeks of ridding the world of XP.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1306977 Title: Ubuntu 14.04 amd64 beta2 install fails with "[Errno 5] Input/output error" (full disk install from USB drive) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1306977/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
