- Fix an issue with access permissions to underlying disks used by a gvinum   plex. If the plex is a raid5 plex, and is being written to, parity data might   have to be read from the underlying disks, requiring them to be opened for   reading as well as writing.
- Fix an issue with access permissions to underlying disks used by a gvinum
  plex. If the plex is a raid5 plex, and is being written to, parity data might
  have to be read from the underlying disks, requiring them to be opened for
  reading as well as writing.

MFC after:	1 week

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase