You can list Snapshot copies and retention dates.
The following output lists Snapshot copies and retention dates:
system> snap list -l wormvol Volume wormvol working... snapshot date retention date name -------------------------- -------------------------- -------- May 13 19:56:50 2005 +0000 May 13 19:59:42 2005 +0000 sv_hourly.20050513_195442_GMT May 13 19:51:07 2005 +0000 May 13 19:55:08 2005 +0000 sv_hourly.20050513_195006_GMT May 13 19:12:06 2005 +0000 May 13 19:15:43 2005 +0000 sv_hourly.20050513_191043_GMTSnapshot copies with a dash (-) in the retention date column are not WORM Snapshot copies; therefore, they do not have retention periods.