Native Tape Library based Encryption Vs. Symantec KMS; Need some clarifications...

Hi all,

I would like to know whether is it possible to encrypt backups (NDMP backups) if there is encryption support built-in to the tape library (i.e. hardware based encryption) WITHOUT using Symantec Key Management System (KMS)?

If we are not to use Symantec KMS, how we should managed encryption keys? Is it directly from tape library GUI ?

What advantages that Symantec KMS would give in manageing Encryption keys with KMS?

Can we use the hardware based encryption in all LTO4, LTO5 & LTO6 tapes, provided that we have respective tape drives with adequate licenses ?

Finally, what are the versions of Symantec that support KMS?

Thank you in advanced :)