'External' HD - All Data Gone, Partitions Still There

I've just experienced my 'external hard drive' not letting me access any data. I put 'external hard drive' in apostrophes, as it's actually an old SATA Internal Hard drive, in an external case.The hard drive was partitioned into two partitions. One about 100GB large which had Windows 7 installed on it, from when I used it inside my desktop. Another which was encrypted with TrueCrypt and was about 800GB large. I tried loading the second partition with Truecrypt, but the computer locked up. In the end I had to turn off the computer manually by the power.I booted up and I couldn't see the hard drives at all - not even in Computer Management. I turned the HD power on and off a couple times and eventually they were viewable - only they'd turned into three partitions, with an extra 24GB partition as the active, primary partition. It might've been that way before but not viewable in My Computer. Now I can see the sizes of the partition in Computer Management, but they show as 0MB in My Computer, as if I'd not formatted them. When I try open them in My Computer though, it lets me open them - it doesn't tell me they need formatting.I'm currently running TestDisk, but it can only see the 24GB partition. how I can recover my data?

Edit: TestDisk Results: No Recoverable Partition Found.Also noticed file system now says RAW.