You can protect the data in your replication system by maintaining separate (standby) copies of primary data. Two possible standby methods are:
Warm standby application – a pair of Adaptive Server databases, one of which is a backup copy of the other. Client applications update the active database; Replication Server maintains the standby database by copying supported operations to the active database.
Hardware data mirroring – a form of hot standby application. With the use of additional hardware, data mirroring maintains an exact copy of the primary data by reproducing all operations on the primary data.