![]() ![]() It's still not impossible, just harder.Įveryone wants an air gap. By separating the backup from the primary via an air gap, you make it harder for a hacker to pull that off. If all backups are accessible via the same computers that might be attacked, it is possible that a hacker could use a compromised server to attack your backup server. This air gap accomplishes more than simple disaster recovery it is also very useful for protecting against hackers. It literally means there is a gap of air between the primary and the backup. Your backup copies, or at least one version of them, should be stored in a different physical location than the thing you are backing up.Īn air gap is a way of securing a copy of data by placing it on a machine on a network that is physically separate from the data it is backing up. The problem wasn't tape the problem was he put his backups on top of his server. 1 backup off-site: A speaker at a conference once said he didn't like tapes because he put them in a box on top of a server, and they melted when the server caught fire.This is why you always have the backup on different media than the original. If the primary drive fails, the backup will fail as well. You can fool it using Disc Utility to split your hard drive into two virtual volumes, and then use Time Machine to backup the first volume to the “second” volume. Consider, for example, Apple's Time Machine. 2 different media: You should not have both copies of your data on the same media.Any good backup system will have many more than three copies. 3 copies or versions: Having at least three different versions of your data over different periods of time ensures that you can recover from accidents that affect multiple versions.Let's take a look at each of the three elements and what it addresses. The 3-2-1 rule says there should be at least three copies or versions of data stored on two different pieces of media, one of which is off-site. It's important to understand why the rule was created, and how it's currently being interpreted in an increasingly tapeless world. This is a problem, because the 3-2-1 rule is easily one of the most foundational concepts for designing data protection. ![]() ![]() As the number of places where we store data increases, the basic concept of what is referred to as the 3-2-1 rule often gets forgotten. ![]()
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