LTO 4 encryption support?

Hi,
It is said that LTO 4 drives are starting to be available and
that they have encryption support built in.

Does anyone know anything about the encryption stuff on it? In particular:

1) How can I tell if it is using encryption?
2) How can I set the encryption key on the drive?

I guess my biggest worry would be running a drive which I believed wasn't encrypting and then only find out when I replace the drive that it was encrypted; with some default key I didn't know. However it would be nice to run with encryption if I could then store that key in a few nice secure places.

Suggestions welcome.

Dave

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