I've also run into this problem on my Acer laptop while running Dingo alpha5 in RAM from CD.John Doe wrote:booted dingo alpha5 with 'pfix=ram' (twice) and it didn't unmount the optic drive either time
I tried using Pmount to first mount (succeded) then unmount the CD to eject the disc, but I just got 'Failure! ... '
Trying umount /mnt/sr0 in a terminal resulted in 'Device or resource busy'