Historical data
Historical data includes interval, daily, weekly, and monthly archived call data. In addition, historical data also includes event data, which consists of:
When historical data is restored from a maintenance backup tape, the restore program creates a restore range, which is based on the available data actually found on the backup tape. The restore range is not necessarily identical to the start and stop times you specify in the restore window. For instance, disparities between specified and actual restore ranges can occur when the stop time specified in the restore exceeds the end time for the last data rows for a given table copied to the backup.
After the restore range is calculated by the program, any existing data rows in the current table that fall within the calculated restore range are deleted. The restore program then copies in the new data to the table, which replaces all the previously deleted rows, and any new data rows that may have been included in the actual restore range.