filer01*> sis config
                                              Inline
Path                 Schedule     Compression Compression
-------------------- ------------ ----------- -----------
/vol/SATA_PRD_DEDUP  sun-sat@0    Disabled    Disabled
filer01*> sis config -s - /vol/SATA_PRD_DEDUP
filer01*> sis config
                                              Inline
Path                 Schedule     Compression Compression
-------------------- ------------ ----------- -----------
/vol/SATA_PRD_DEDUP  -            Disabled    Disabled

filer01*> sis config -s sun-sat@0 /vol/SATA_PRD_DEDUP
filer01*> sis config
                                              Inline
Path                 Schedule     Compression Compression
-------------------- ------------ ----------- -----------
/vol/PRD_DEDUP sun-sat@0    Disabled    Disabled

http://blog.scottlowe.org/2008/03/31/quick-guide-to-setting-up-netapp-deduplication/
http://blog.scottlowe.org/2008/04/24/using-netapp-deduplication-with-block-storage/
http://blog.scottlowe.org/2008/05/20/provisioning-luns-for-use-with-deduplication/