The 3-2-1-0 Rule to High Availability
Reliable backup is one of the foundations of availability. When things go wrong, data can be lost. The more data that is lost, the greater the potential business impact. Part of getting back up and running quickly is being able to restore operations to where they were before the problem started. Sometimes, however, problems are not limited to a single occurrence. Compounding of problems can put your backups at risk as well.
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