Whenever you create an NSS volume with NSS management tools, NSS automatically generates a DFS GUID and writes it as an attribute in the volume object and in the ~DFSINFO.8-P file located in the root directory of the volume. The file is used to restore a DFSGUID for the volume during a VLDB repair in a rare occurrence that the information has been lost in eDirectory.
Any trustee with Read and File Scan rights at the root of an NSS volume can see this file. It also shows up if you point any junction at the root of a volume, because this file is present for all NSS volumes. You can remove Read and File Scan rights to the file for users who you do not want to see the file.
This file is only visible on NSS volumes on OES Linux.