In order to restore and recover a database to the most recent state without data loss, the very latest transaction logs need to be applied. However MS SQL in a restore scenario applies only the log files being restored from backup media. It does not use any log file that was on disk already before the restore. Therefore, in order to have a complete set of log file backups, MS SQL Server 2005 and later versions require that you also back up the very latest transaction logs from disk, they so called 'tail of the log'. A log file backup taken just before beginning a restore operation is called a tail-log backup. The tail-log backup prevents work loss and keeps the log chain intact.
This option is available in Data Protector from the Restore context while restoring the database under the options tab.
