[HarryT]

... please check your stonewire2008_filesystem_networking_guide.pdf in the documents folder on your workstation (side 55):

NOTE: Only Linux workstations can directly mount standard filesystem volumes for media storage. An IRIX workstation must use Wire to connect to a standard filesystem, going through the Linux workstation that mounted that filesystem: you cannot configure a standard filesystem volume for Effects or Editing on an IRIX workstation.

p.s.
... what about answering my message from April 15th? Thank's.