In message <199601290200.SAA02476@lestat.nas.nasa.gov>you write:

> 	DIOCALLOW	allow disk to be ejected
> 	DIOCPREVENT	prevent disk from being ejected

Perhaps these could be called DIOC_ALLOW_EJECT and DIOC_PREVENT_EJECT,
in case there are other things to allow/prevent in the future.

Dave