Unfortunately I had a couple of hard resets on a machine and it seems to have damaged an NTFS partition. O/S is Windows 2012R2.
C:\Users\Administrator>chkdsk d:
The type of the file system is NTFS.
Volume label is XXXXXXX.
WARNING! F parameter not specified.
Running CHKDSK in read-only mode.
Stage 1: Examining basic file system structure ...
18085632 file records processed.
File verification completed.
5195 large file records processed.
0 bad file records processed.
Stage 2: Examining file name linkage ...
18240430 index entries processed.
Index verification completed.
CHKDSK is scanning unindexed files for reconnect to their original directory.
1 unindexed files scanned.
An unspecified error occurred (6672732e637878 56f).
Any suggestions other than reformat/restore from backup to fix the partition?
You need to check S.M.A.R.T first.
In the Command Prompt window, type the following commands, pressing Enter after each:
wmic
diskdrive get status
Or you can use CrystalDiskInfo http://crystalmark.info/download/index-e.html
If HDD health is NOT OK, you need to change it. If HDD health is OK, you can try to repair by using
chkdsk /f D: and chkdsk /r D: