netra [~]# zonefss -l
  ID NAME             SHARES
   0 global           10
   1 mailsrv          30
   2 websrv           60
netra [~]# zonefss -z websrv 50
netra [~]# zonefss -z mailsrv 20
netra [~]# zonefss -z global 30 
netra [~]# zonefss -l
  ID NAME             SHARES
   0 global           30
   1 mailsrv          20
   2 websrv           50