This is the real downside of RAID (and especially the so-called RAID 0, which actually has no redundancy at all). With RAID 1 you might have been able to recover the data, with RAID 0 it is a specialist job (mucho $$$). I would advise transferring as much data as possible onto an external drive, then reformat and clean install on a standalone drive.

I decided long ago that the somewhat pathetic "RAID" controllers are far more trouble than they're worth, and very dangerous to your data. If you need RAID, spend the money on a proper hardware controller card.