Create a Snapshot (Not to be confused with a Snap Session) for each LUN.  Select one of those LUNs you want to snap and go to "Create Session" under snapview. Check "Consistent" and select all the LUNs the DB uses. Once the session is cereated,  activate both snapshots with the same Session.  FYI:  Terminology - Snapshot and Session Snapshot - Think of it as a "Virtual LUN".  It's a wrapper that sets aside a LUN ID, WWN so that you can present it to a server.  By itself, it is useless and can do nothing.  You need a session to actually do anything.  A Snapshot is a container for a Session. Session - Is actually the point in time copy of a LUN.  A Session is added to a added to a Snapshot to make the Snapshot active and available for I/O.
Dear All,  is there a procedure to start two snapshots for two luns at the same time ??  many thanks for your help  regards, Ali
Start two snapshots on same time