I used my 4TB USB3 drive yesterday to backup some data from an older netbook. I used a LiveLinux for that... all worked normal. After copying the files with rsync I shutdown the linux and disconnected the drive. So far nothing I would consider to be harmful for the NTFS-partition.
Today I did want to make a backup of another harddisk on my main-PC Win7 told me it couldn't read the drive


I kinda feel uncomfortable to running testdisk on the actual drive and not on a clone-copy, though no 4TB disk for that at hand right now. :/ Testdisk's "quickcheck" is still running since 4 hours, 2 more to go I think.
Though it already shows me this:

Is that normal? Why is it not seeing an NTFS parition? O_O