Definition of 'Geographically independent' in terms of offsite backup storage

["WereTiger" <weretiger () weretiger ca>]

In looking over the policies of a contract I’ve been put on, the critical
stress has been put on data security and retention.  They currently use
offsite storage by swapping tapes between their two buildings which are only
15km (9 miles) apart.

Is that enough?
How is that any safer than a good fireproof vault?

-WereTiger



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