The recovery log mode for the Tivoli® Storage Manager is the roll-forward mode. The recovery log stores data that is required to back up a restored database to the most recent committed transaction. You must have the most recent recovery logs to use the roll-forward mode.
Changes to the database are recorded in the recovery log to maintain a consistent database image. You can restore the server to the latest time possible, by using the active and archive log files, which are included in database backups.
To help ensure that the required log information is available for restoring the database, you can specify that the active log is mirrored to another file system location. For the best availability, locate the active log mirror on a different physical device.