lulf 55553856e4 - 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
2008-12-27 14:32:39 +00:00
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