Hopefully this finding can avoid some bug or BSOD in your drivers.
For basic storage volume or devices, the function returns DOS drive names
like C:, D: etc.
If a dynamic volume is not assigned a drive name and is mounted on another
NTFS volume like C:\somepath\mountname, the function returns the path of
C:\somepath\mountname. The DDK document does not explain this feature.
Regards,
Shangwu