I installed Ubuntu 14.04 and all was well until a recent update mess things up. Now when I boot up it get stuck at
 mnt/sdb1 is not ready or present press s to  skip M to manually repair
plus another choice. If I select M you get to a dead end and have to reboot. I usually skip to boot. The other choice gets me to the boot screen where you can choose Ubuntu and other choice. Right next to U the Ubuntu choice I see *Ubuntu that is very strange . Can you help? I don't want to reinstall.
 
     
    