I have a friends hard drive (Seagate 750GB SATA) that appears in windows as a RAW drive. This was a primary boot drive in an Acer Aspire tower. Needless to say the computer won't boot so I connected the drive to one of my working Win7 computers with a USB adapter. I booted with PartedMagic CD but the suspect drive is only detected as "unknown" is DiskHealth. Testdrive will only return read errors. Short of professional data recovery services, is there anything else I can try to get the data off the drive?