IT Jungle Article: Immutable Copies are only as good as your validation

A system can always be replaced, but the files and objects that comprise the application and the data that makes it useful can fall victim to all sorts of decay, neglect, or abuse in a modern system. And that is why we did backups to tape subsystems, or even tape libraries and then virtual tape libraries based on disk drives for so many years. And for those who cannot afford to have downtime or lost data, the IBM i base has been fortunate to have some of the best high availability clustering ever invented.