When we apply the 3-2-1 backup rule, we always have a secure copy of our data. Peace of mind in these days of frequent data loss.
The 3-2-1 rule is ingenious, but so simple to execute. It consists of 3 stages:
Have at least 3 copies of your data;
Store these copies on 2 different media;
Keep 1 copy off-site (easily done on the cloud).
Rule #1. Have at least 3 copies of your data
This first step of the 3-2-1 backup rule is based on this calculation:
The probability of a device failing is 1/100.
The probability of 2 devices failing at the same time: 1/100 × 1/100 = 1/10,000
The probability of 3 different devices failing at the same time: 1/100 × 1/100 × 1/100 = 1/1,000,000.
This minimizes the risk of losing data.
It becomes second nature once you develop a backup update routine.
Rule #2. Store data on at least 2 different media
The 3-2-1 backup rule is based on another important premise: your data is less secure if you store it on the same medium. Imagine what would happen if he failed!
Consider using other devices, such as :
An external hard drive;
A USB stick;
A network attached storage server (NAS);
A private cloud.
Most importantly, keep this in mind: even if your backups are stored on multiple hard disks on a single storage server, the risk of loss is higher. In fact, when one disk fails, it’s not uncommon for another to follow.
Rule #3. Keep a copy off-site
Finally, the last safeguard rule 3-2-1 assumes that accidents happen so quickly. This is why the physical separation of your backups is essential to ensure the protection of your data.
We don’t wish for misfortune, but should fire, flood, theft or other catastrophe strike, you’ll be glad you kept a device in another location.
Consider the private cloud to maximize your level of security
Choosing the private cloud is an excellent way of providing an extra level of security for your backups, especially for SMEs. Unlike the public cloud, where your data can be accessed by a third party, you retain control and can only share this information with a small number of users.
However, off-site backup needs differ from one organization to another. The Aiki Informatique team makes sure to apply this famous 3-2-1 backup rule in the way that best suits your needs and budget.
