我正在尝试在 Oracle VirtualBox 6.1.6 上设置 Ubuntu 20.04。在安装过程中，我收到以下错误消息：
The installer encountered an error copying files to the hard disk:
[Errno 5] Input/output error
This is often due to a faulty CD/DVD disk or drive, or a faulty hard disk.
It may help to clean the CD/DVD, to burn the CD/DVD at a lower speed,
to clean the CD/DVD drive lens (cleaning kits are often available from
electronics suppliers), to check whether the hard disk is old and in
need of replacement, …