Ops, I probably need to wipe out the whole disks as well. Because I followed blue light steps, and after that I deleted the /opt directory. But the problem remains the same when I then followed the white light steps.
BTW, could you let me know how to wipe the disks by using support.html page?
Many thanks.
Thinking about this problem I came across the ideia that updating the firmware may resolve the situation, if you havent updated to the latest (2.1.30) try that, if it work it will save you 8 hours of array rebuilding.
To reset the iomege just go to the support page where you enabled the ssh access and choose reset data protection. This took me 8 hours but after that the linux filesystem was like "factory default".
Good luck
BaRRoS