The storage media need to be completely different and separate from one another. For the same reason, storing several copies of your backups on the same RAID array or in the same cloud does not allow you to satisfy this requirement of the 3-2-1 backup rule. It is not sufficient to store several copies of data on different internal hard drives of the same server, as a failure of that server would render all the copies unavailable. ![]() You need to employ a solution that backs up every device and system correctly. If you have a physical server, a solution that only backs up virtual machines would be insufficient. Otherwise, some data may go unprotected, or numerous backup methods may be required. Make sure that the backup solution you chose can secure all your data. ![]() However, if you had also had a third copy stored off site or in the cloud, your data would still be safe. However, an office fire could destroy both copies of this data at the same time. For example, you may have one copy of data on your desktop PC, and another copy on an on-premises hard drive. This is to lessen the chances that all three copies are simultaneously destroyed in the same incident. The critical point is to have at least two different storage mediaĪt least one of the copies of your data should be kept separately from the other two. In some circumstances, the original copy of your data may be a physical document, and so in those cases paper could be considered one of the storage methods. Hard drive, cloud storage, and magnetic tape backup are all electronic methods for data storage. You should utilise at least two different storage media for your data. That means that in addition to the original copy, you should have at least two backups You should keep at least three copies of your data. Why is it called the Three-Two-One method? Let’s explain… What Is The Three-Two-One Rule Of Backups Why Is This Important It represents the minimum conditions that must be met for a data backup to be reliable. The three-two-one rule for data backup is an industry standard method for data backup. Remember to review the scope of your backups regularly as your business circumstances change. Remember to also back up mobile devices your CEO’s phone might even have more sensitive and vital data on it than some of your desktops. You should also back up any virtual machines along with their management console. You should back up files and databases to lessen the chance of data loss, but you should also back up your apps, your operating systems and everything else you can. Let’s look at some best practices for developing your own data backup strategy, as well as some technologies we’ve provided our customers with. Well, to be precise you need more than one backup, but more on that later. Having effective cybersecurity in place can help prevent the chances of a cyber-attack and a disaster recovery plan can help you get back on your feet after an office fire, but for true peace of mind you need an up-to-date backup of your data. That’s why it’s vital that your business doesn’t lose any. Data is at the heart of everything a modern business does.
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