Windows Boot Camp disk or patition is not appearing in Finder

Symptoms

After unclean Windows shutdown in Boot Camp or Virtual  machine based on Boot Camp, you will not be able to see Windows partiton, if you have NTFS-3G installed

Cause

NTFS-3G  intercepts  all Mac OS ntfs driver calls, and manage NTFS partiotions on boot, or after Virtual machine is stopped.
If Windows was not cleany shutdown, NTFS-3G doesn't mount dirty NTFS volume by default.

 

Resolution

Please start Windows in Virtual Machine or directly in Boot Camp, and perform disk check using chkdsk utility 

chkdsk DriveLetter: /f /r

or GUI utility from disk properties and select repair errors option.
Please note, that you need to restart Virtual machine, or Windows in Boot Camp to finish process.

After you logon to Mac OS, or stopped Virtual Machine, sometime it is still necessary to mount Windows partition from Disk Utility