I'm sorry to tell you this: RAW means that the partition is not formatted. That means the partition is not readable. If anything was previously on the partition it is now lost. Your best recourse is a professional file recovery service.
If the partition still has a drive letter, there is a slim chance that running the CHKDSK command will recover the formatting. However, running CHKDSK can also destroy any chance of recovering the files on the partition. You have to decide if you're willing to take the chance the chance.
You're taking the same chance if you try to use consumer file recovery software on the partition. There is a slim chance that it will recover some files, but there is also a chance that it will make it impossible to recover files. Again, you have to decide if you're willing to take that chance.