CD Will Not Eject, Unmount

1. burned using k3b
2. still showed as blank cd-rom on desktop
3. used physical eject button on cd, closed drive after it opened
   
4. tested data on cd: cd showed up with label, file opened
5. tried to eject (gave error)
6. tried to unmount (gave error i.e. "error: kio_media_unmounthelper unmount: /media/hdd is not in fstab")
7. (light on cd-rom drive is flickering)

Solution: If I wait a couple minutes, I can then use right click->eject

I guess other apps aren't releasing permissions to the drive to preven accidental manipulation and use by other programs?

(edit: same dealie with my USB flash stick. I moved files into a directory on my desktop. Well after it was finished, I attempted to right click-> safely remove, and it gave me the same error)