Hi, i observed the device not compress data, i have HP DAT 72i, and only enter 40 Gb, how to activate the compresion on Device??

I see a tecnical information document of CA, only whith blank tape it´s posible activate the compresion, I formated a media whit compression activated and only 40 gb of capacity enter on the media?

On Windows Machine with idem DAT, enter 72 Gb....

any ideas??