Duplications are "waiting for media" with reason - SmartDisk - : Device has too many streams
This happens when the default maximum stream limit setting of 8 simultaneous streams has been exceeded. This includes both reads and writes to and from SmartDisk.
Allow SmartDisk to use more streams, example listed below:
smartdisk config --streamlimit-limit 15
Here the stream limit will be set to 15 streams (which can be reads and writes).
To commit the changes you will have to restart SmartDisk with the following command, so make sure this is done out of the backup window:
smartdisk restart