I haven't investigated further, but for the 3rd time while archiving my media to disk, repeatedly using sysutils/eject after copying data from CD/DVD to disk will eventually fail with: eject: Input/output error I suspect that there is a leak of FD or memory in the CDIOCEJECT path that needs to be eyeballed.
I should say, that after this condition occurs, a reboot is required to make the USB CD/DVD device work again.