ZIP drive not accessible if disk is not inserted before booting

[Michal]

ZIP drive is not accessible if zip disk is not in the drive while booting.
I am getting error msdosfs /dev/da0s4 no such file or folder
If  disk is in the drive prior bootin then everything is o.k. and I can 
acces zip. Problem is with internal and parallel zip drive on CURRENT.

Is there a way to probe drive while disk is inserted without requirement 
of sticking disk to the drive before booting?

Michal