Each non-global zone can take a snapshot of its private file systems when it is convenient for that zone and the application has been briefly quiesced. Later, the global zone can back up each of the snapshots and put them on tape after the application is back in service.
This method has the following advantages:
Fewer tape devices are needed.
There is no need for coordination between the non-global zones.
There is no need to assign devices directly to zones, which improves security.
Generally, this method keeps system management in the global zone, which is preferred.