RAW simply means the partition/formatting information is corrupted or missing.
The fact that your testing consistently fails at about the same location, would seem to indicate there is a hardware issue with the drive.
The best thing to do would be to try and test the drive with the HDD manufacturers disk tools. But without opening the enclosure, you aren't likely to figure out which brand of disk is used.
Give Partition Table Doctor a try and see what it can find.
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