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> Backups need to be offline... ...and tested on independent infrastructure. I worked with a financial Customer in the late 90s who, quarterly, sent a backup

> Backups need to be offline... ...and tested on independent infrastructure. I worked with a financial Customer in the late 90s who, quarterly, sent a backup to an independent party for restore of the data into a freshly created application environment. They verified the backup with reproduction of key reports and random spot checks of data. It was impressive.

banish-m4 2y ago
That's proper backup verification. At a minimum, restore to nearline temp storage. Ideally, backup and verify against hot storage SAN or FS volume snapshots. For absolutely business-critical data, I would consider using multiple backup approaches and/or vendors. Shout out to Tarsnap as vital here that every commercial enterprise should use for essential customer, contract, and accounting data.