Ok so... I followed the instructions found there:http://forums.extremeoverclocking.com/showpost.php?p=3329132&postcount=6
I now have a "new" identical array of my 5 disks. I ran Testdisk and found my partition. Then I chose "write partition data" and restarted.
My array is still shown during bootup in initialisation (as if it was all new) and the "matrix storage utility" starts initialising it, instead of finding my old partition... I'm worried that, when it does that, it is actually formating and creating a brand new partition, thus erasing my old one with all my data...
Can anybody advice me?