>warning: Driver (mt) successfully added but faild to attach

>The drive works fine on Solaris using the "tar" command.

Jerry - The usual problem with this scenario, with any operating
        system, is that the standard device driver was already
loaded to control the drive, and you tried to deploy another.
I believe that what you have to do is, somehow in Solaris,
dissociate the tape drive from the usual device driver and then
associate it with the mt one.
   Richard Sims, BU