Compression and archiving

Hi, Being new to Informix database (I was recently employed by AT&T to work on one), I was wandering if anyone knows whether Informix itself allows the user to switch compression on or off when archiving. I am currently using tape driver EXB-8505 which has the capability to do archive in 2 modes (compression and non-compress). The problem is that those modes are software controlled, and my unix commands (developped by AT&T) do not set compression off. Does Informix provide any such commands? Manuals and my co-workers could not help with the problem. Tom ------------------------------------------------------------------------------ T.D.