You can back up a database either offline (when it is shut down) or online (when it is running).
After you back up a database, make sure the backup copy is not corrupt. To do this, run the SYSCS_UTIL.SYSCS_CHECK_TABLE system function on all the tables in the backup copy. Do not discard the previous backup until you have verified the consistency of the current one. See Checking database consistency for more information.
The topics in this section describe how to back up a database.