After that i've tried to go to the Cloud Version firmware, and actually manage to get it working.
Unfortunately after all my efforts, i got stuck at the "You must specify a value for pool:name." error.
Since the firmware i've installed didn't had the "Add a storage pool" option as in this video, https://www.youtube.com/watch?v=vI20M24C9_w
i was forced to return to the regular firmware...
Since i had all this trouble to revive this unit, i think i'm going to improve it a bit more.
Let's face it, it would be sweet to have a 9TB RAID 5 Nas Storage...
Thanks for all the help so far.