Ubuntu Server – Install Error: Can’t Umount /media

serversystem-installation

I'm trying to install Ubuntu Server 14.04.2 on an old Athlon 64, but as soon as I get past the initial menu, choosing to install Ubuntu Server, I get some console output and everything gets stuck on:

mount: mounting /dev/sda on /media failed: Invalid argument
umount: can't umount /media: Invalid argument
mount: mounting /dev/sdb on /media failed: Invalid argument
umount: can't umount /media: Invalid argument

I used the exact same USB stick to install on another box. I couldn't find anything else about this error other than this topic, where one user claims it eventually works, but in my case I left it sitting there for almost an hour and nothing.

Best Answer

I found some brutal but effective method :-) When I reach that error I simply pulled out the USB stick wait for about 10 seconds and push it in again. Waiting for another 10 seconds, enough to be mounted. After that, I choose to retry the CDROM search and... voila, the installation goes on. Once again, it is brutal and can damage your USB stick, but it worked for me.

Related Question