If you’re looking into data protection solutions you’re probably have heard the phrase “3-2-1 backup”. You’ll hear it from most IT consultants, professionals as well as many backup vendors and admins.
Every admin should have backups. This 3-2-1 principle works for any virtual environment regardless of the hypervisors you are running (VMware, Hyper-V or whatever). and it can effectively address any failure scenario
- Keep at least 3 copies of your data
That includes the original copy and at least two backups.
- Keep the backed-up data on 2 different storage types
The chances of having two failures of the same storage type are much better than for two completely different types of storage. Therefore, if you have data stored on an internal hard drive, make sure you have a secondary storage type, such as external or removable storage, or the cloud.
- Keep at least 1 copy of the data offsite
Even if you have two copies on two separate storage types but both are stored onsite, a local disaster could wipe out both of them. Keep a third copy in an offsite location, like the cloud.
“There two groups of people: those who have already had a storage failure and those who will have one in the future.” – Peter Krogh