Nowadays every communication is based on technology. Everyone can talk, chat or massaging or share files and data easily to anyone who is in any part of the world.
But the focus off the topic is not how we communicate, what to use to communicate; rather it is how to put our important data in safe place so that in case of any disaster we can easily recover our data with no stress.
Most people don’t understand the pain and stress of lack of back-up until things happen on them. So our recommendation is always act before something happens. Try to take backup based on the frequency of data changes. Note that the principle of back-up is to make copies of particular data in order to use those copies for restoring the information if a failure occurs that is when a data loss event due to different reason example mistakenly deletion, corruption, theft, viruses ,hard disk or media failures etc.
There are different types of backups that are used differently based on the files or data changing frequencies. A type of backup actually defines how data is copied from source media to destination media and lays the grounds of a data repository model that is how the backup data is stored and structured when it is needed.
1. Full backup: This type of back-up is: a complete back-up of everything you want to backup. Using this method of back-up creates a lot of redundancy even if there is a small change from the last back-up taken; it takes back-up the whole data. So when you use this type of back-up, consider your environment and must have large space for back-up. The advantage of full back-up is that data restoration is fast as you only need on back-up data set. And its disadvantage is because it backs-up the whole data it is a slow process and it needs high storage media.
2. Incremental back-up: These methods of back-up will use to back-up only the changed data from the last backup taken from any of the backup methods. For example if you did a full backup on Thursday. An incremental backup made on Friday, would only contain files changed since last Thursday, and an incremental backup on Sunday, would only contain files changed since Sunday, and it goes like that. The advantage of an incremental backup is that it takes the least time to complete. However, during a restore operation, each incremental backup must be processed, which result in a lengthy could restore.
3. Differential backup: These back-up methods will copy all the data, files, or parts of files that have changed since the last full backup, even if you already have identical copies of those files in a previous differential back-up. In this case to restore the data in case of any failure or loss of files, you will need to back-ups to restore that are the last full backup, and the last differential backup will make the tricks.
We have seen so far type of back-ups and when we will use them. After knowing the back-up types, we should have to know where to take the back-up? What are the best tools or software that are used to take back-up and easy for data restoration while data loss.
In Ethiopia, there are two(2) companies that are working on data back-up and data restoration .These are BGK technology plc and Hub-systems locally based in Addis Ababa, Ethiopia.