Are there any "affordable" data recovery solutions out there that can recover data from "striped" drive arrays? I'm not sure.
I've no idea what went wrong with your system DV8, but I know the pain you're in right now having been there myself before.
I can assure you, changing the tags on files MC may be playing won't present any problems like this. Something else has gone badly wrong. We cannot really offer too much advice without knowing which file system you were using. I would advise ditching the RAID setup though. I tried the striped array route once hoping for massive speed increases that were infact negligible. My Asus board, by way of a jumper setting allows the raid controller to be used as eide ATA 100 channels instead. I have 4 hard drives attached this way and things are still d*mn quick and for sure, a whole lot more stable.
Research your options re. data recovery. If you were using ntfs and your mft has gotten screwed, you may have to accept the data loss. Once you either have your data back, or accepted the loss, you must consider you disk setup. Will you persevere with the striping? If not, those disks that (presumably) you had in a striped array... I strongly recommend a low level format (check manufacturers website for tools) to completely remove any traces of the striping, as you will experience much wierdness and numerous errors on them if you simply attempt to perform a basic format then start using them as individual disks.
Either way, I don't envy you as you have some extremely time consuming tasks ahead of you.
Good luck with it all, let us know how goes it, ok.
-marko.