I tried another data recovery software first, but it was useless, as it would show I had 5.7TB data on a 4TB (3.63TB usable) disk!! Then I tried a Partition recovery software, but it spent 23 hours scanning my disk and then tells me I had no recoverable or lost partitions....
Now here comes TestDisk :
I then learned about TestDisk by chance, and you guys are a life saver. The Filesystem repair tool in TestDisk told me that my BootSector, both primary and backup, were Bad. I attempted repair of boot sector through TestDisk, but it did not succeed. Something about mismatch in bytes per sector. Sorry, I overwrote the actual log file during data recovery, but this part keeps showing up in all logs:
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Boot sector Warning: number of bytes per sector mismatches 4096 (NTFS) != 512 (HD) Error: size boot_sector 976745984 > partition 4294967295 Status: Bad Backup boot sector Status: Bad Sectors are not identical. A valid NTFS Boot sector must be present in order to access any data; even if the partition is not bootable.
Now for the question:
Now that my Data is all backed up, thanks a million to TestDisk, I want to make the disk usable again. It does not matter if I have to format it. Will a full format under Windows 10 do the trick and write a new BootSector, or is there something else that needs to be done to make the disk available to Windows again? I am a complete noob to Disk issues, so please help.