Your first problem is that you used a MBL debrick script on a MBLDUO
The MBLDUO uses a RAID swap. If you used the MBL script with the destroy flag, you have created a non raid swap partition on your disk a
SSH in and issue
parted /dev/sda p partition 3 should be marked primary raid
You may be able to flag it as raid if it isn't in use
parted /dev/sda set 3 raid on reboot Hopefully after a reboot the DUO will then create the swap array on its own which would be /dev/md2
I don't own the DUO, just the single drive so I can't say this will work or not
Check my guide here as well
community.wdc.com /t5/ My-Book-Live-Duo/ GUIDE-Debrick-a-MyBookLive-DUO/td-p/544860
Take out the spaces because I can't post links