In the unlikely event that your installation requires double encryption for a dump data set, you can use the following procedure:

1. Request host-based encryption for the data set (through the RSA or KEYPASSWORD keywords) and write the data set to a non-encrypting output device
2. Use the DFSMSdss COPYDUMP command to copy the dump data set to an encrypting tape device.

To restore the double-encrypted dump data set, use the DFSMSdss RESTORE command. The encryption capable tape drive decrypts the dump data set and then DFSMSdss performs host-based decryption for the data set.