We have some customers running NW7.3.2jumbo1 on SUN arrays with ZFS.

This works, not terribly fast, but there is some other NW732 weird
stuff with CAP I/O, and jukebox parallelism, on SL500, that I don't 
have with NW722 sites, so I understand your reluctance to go to NW73.

I opened in october 2006 a RFE LGTpa94821, support for ZFS in NW722.

You could raise a call with either SUN or EMC and ask to be added as an
affected customer to LGTpa94821.  It should be easy to patch nw722.

Finally, the question on 'All' is LGTpa91299.  In the release supplement
of NW732jumbo1 you'll find:

        zfs unmount <zpool>
        zfs set mountpoint=legacy <zpool>

I haven't tested the 'set mountpoint=legacy' myself, but it sounds reasonable.

Regards,
David Stes

To sign off this list, send email to listserv AT listserv.temple DOT edu and 
type "signoff networker" in the body of the email. Please write to 
networker-request AT listserv.temple DOT edu if you have any problems with this 
list. You can access the archives at 
http://listserv.temple.edu/archives/networker.html or
via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER