As overseeing backing up, from various optical media to disk, just don't use the optical stuff!
This was a huge international conglomerate, doing CD backups for decades. Now it turns out these precious backups only worked 96-98% of the time. Terrible stuff.
Actually 96-98% is not great but not terrible if you're employing some kind of parity scheme across multiple discs. It just means 1 in 20 (or 1 in 10 to be safe) extra discs in the mix.
This was a huge international conglomerate, doing CD backups for decades. Now it turns out these precious backups only worked 96-98% of the time. Terrible stuff.