I kind of solved the issue. In fact everything is "working" but my RAID array is not assembled automatically at boot time. So if I enter "mdadm --assemble /dev/md0" in the busybox shell, and exit from it, then the computer boot properly (except for X errors, but they are linked to the update).
I kind of solved the issue. In fact everything is "working" but my RAID array is not assembled automatically at boot time. So if I enter "mdadm --assemble /dev/md0" in the busybox shell, and exit from it, then the computer boot properly (except for X errors, but they are linked to the update).
But I don't know how to enable it automatically.