My Book DUO Power Consumption / Encryption / Spindown / Gen 1? 2?

I am thinking about a My Book Duo as a safe hdd on a router/NAS. (RAID1)
But I have a few questions I couldn’t find the answer to.

  1. What is the power consumption of the duo? (Standyby/access)
  2. Encryption is optional, isn’t it? (I don’t need it and better in case of bridge defect)
  3. Does the DUO turn off the disks if there is no access?
  4. Always reading from Gen1 and Gen2, what’s the difference, how do I know the Gen?
  5. Has anyone here already run the duo on a router?

Thank you very much.