ASA Database Administration Guide
Backup and Data Recovery
Backup and recovery internals
The database server prevents the following operations from being executed while a backup is in progress:
Another backup, with the exception of a live backup.
A checkpoint, other than the one issued by the backup instruction itself.
Any statement that causes a checkpoint. This includes data definition statements as well as the LOAD TABLE and TRUNCATE TABLE statements.
During recovery, including restoring backups, no action is permitted by other users of the database.