What Is an Air Gap Backup? Real Protection vs Marketing

The Backup Wrap-Up

Air gap has become one of the most overused and misunderstood terms in backup and recovery. In this episode, W. Curtis Preston and Prasanna explore what air gap really means, tracing its origins from the days when everyone used tape storage to modern virtual implementations. They discuss how true air gap required physical separation - tapes stored offsite at facilities like Iron Mountain - and why this gold standard is nearly impossible to achieve with today's connected backup systems.

The conversation covers modern alternatives including immutable storage, IAM-based protection, and simulated air gaps that disconnect network connections when not actively replicating. Curtis and Prasanna explain why ransomware has made air gap more important than ever, and provide practical guidance for evaluating vendor claims about air gap capabilities in cloud and hybrid environments.