I know that lsupdater did not respond to the LS so here what i did.
I had to downgrade from 2.21 to 1.5 to see if same problems arises.
How i do it was to remove the hdd internally and delete all partitions, reinstalled the hdd and did a tftpboot after which i update the f/w to 1.15. After a successful update and playing it arnd for couple of days, i then went to update it to 2.11 which also have no problems at all.
I did not say that 2.21 is problem-free but for those who had problems after upgrading to 2.21 and had certain stuff which cannot be done on 2.21 but was alright on previous version of the f/w, my advice is to downgrade to the previous version.
I could only do that as my set is no longer under warranty and I do not have any important data inside.