Shares suddanly not available anymore

Ok,

So the story continues. I pulled drive 1. Mounted it in an x86 Linux PC using the explenation I found on the net

http://home.bott.ca/webserver/?p=306

and

http://technostuff.blogspot.nl/2012/06/how-to-mount-disk-used-by-readynas.html

I was able to copy my files.. I tested the files randomly, old en new, all are accesable and working. So the backup is complete. :D

Next I tried:
- OS reinstall
- Using an USB to "update" the firmware, going back to the last functional 4.1.8

Both no result. Raidar tells corrupt root.

Should I try to go to 4.1.13? because i already tried that update from Frontview, and got a message succesfull (although I doubt that)?

What could be the cause of the problem. Disks seems to be OK, Memory maybe? How can I test??

Is my last resort back to factory settings? Using another disk, and than after a succesfull start and firmware update swapping this disk for the origional disks, still containing my data? Will that work?

Regard

mark