When is the Recovery Record Function Useful?
The Recovery Record is particularly useful for long term backups. Optical media such as CD and DVD, flash memory like USB flash drives and magnetic storage like HDD, can develop bad blocks after long term storage. CDs and flash drives are even more prone to data errors than HDDs.
Adding 5 -10 % recovery record to backups intended for long term storage provides additional protection against such errors. Adding the recovery record does not guarantee successful recovery, but does significantly increase the chances of recovering damaged data.