You are logged on to the database as the database system administrator or as a DBM operator (see Glossary, Server Permission).
The database is in the ONLINE or ADMIN operational state.
A snapshot stores the state of the data area at the time of the snapshot. Once you have made a snapshot, you can continue to work normally with the data for the database and make changes to the data. You can later return to the state the data area was in at the time of the snapshot or accept all changes since the snapshot.