How to fix a partition detected as RAW, when Chkdsk correctly reads it as NTFS?

In the end, after I used TestDisk to copy all the important files off the disk, I finally risked running chkdsk /f and it didn't detect any problems, but apparently removed the "requires checking" flag set after a careless disconnection, and so afterwards the disk was perfectly fine.

I felt a bit silly afterwards, having gone all PhD on the disk, when all it needed was a routine check, but maybe the disk-salvage tools should be able to recognize the "requires checking" flag...