I didn't have a compatible SATA board here, so on a whim I moved the ROM over to the PCB from the parts drive I used. I wasn't really expecting it to do anything different, but just wanted to rule out the potential of the password protection being a part of the original PCB. Just as I expected, the drive still requested the password. Moved the ROM back to the original PCB and I was immediately given access to the drive. I have a head map built and the partition discovered. Just cloning the bitmap now. Really weird.