@cfh11 that sounds like a completely different problem.
@qwerty12: i have no such file, however there is /usr/sbin/osso-mass-storage-enable.sh, I'll try to understand how it works and play around with it.
@volt: you mean the second. the first one is the one containing the vfat. the 2nd one is the one that is unusable. I think I don't even have a sd card. That is, i didn't add one myself after getting the phone.

the big question is: why does the phone expose a 2nd blockdevice which is not even usable because there is no device (sd card) for it?