You seem to have lost the partition somehow and that seems to be the reason why it had turned RAW.
IMO, the best free software to do the recovery from a RAW disk is Test Disk. TestDisk - CGSecurity
It can be a little daunting for the first time user, and so take your time to read through all the documentation.
First use PhotoRec in it - which does not write anything to the drive in question - and try to recover the files.
Then you can use TestDisk and try to rewrite the partition. Some people have reported that even after restoring the partition with TestDisk, the drive remained RAW but they were able to recover most files using the option to copy.
Whether PhotoRec or TestDisk, it is going to take a lot of time to recover the files. Copy them to another external drive with adequate capacity.
You may find some help here to understand the usage. http://www.sevenforums.com/software/193467-guide-using-photorec-recovery-software.html http://www.sevenforums.com/software/190430-regain-lost-drive-using-test-disk-illustrated-guide.html