If your DFSMShsm dump classes are currently defined to use host-based encryption (and possibly host-based compression before encryption), it is recommended that you remove the host-based encryption requests from any dump classes for which you plan to use hardware encryption. These steps are described in DFSMShsm considerations for the encryption-capable TS1120 tape drive.

Over time, as you migrate your DFSMShsm dump classes to use hardware encryption, you might still have dump classes that are defined to use host-based encryption, while their associated data classes are defined to use hardware encryption. Here, DFSMSdss ignores requests for host-based encryption for tape volumes and, instead, uses hardware encryption. This processing allows you to complete the migration to hardware encryption without having to modify your DFSMSdss jobs.

If you no longer require host-based encryption for any of your tape volumes, remove the host-based encryption requests from all of your DFSMShsm dump classes. Thereafter, your jobs can write to a mixture of encrypting tape devices and non-encrypting tape devices without incurring informational messages. This setup allows you to encrypt tapes that are to be sent off-site, while retaining unencrypted tapes on-site for disaster recovery purposes.