BACK-UPS

Back-up is a crucial process that everyone should do in order to have a fail safe for when an inevitable happens. We have different types of back-ups.

1.      Full back-up

It assumes each time you execute a task the entire set of data is copied to the chosen place. This type of back-up takes the most disk space, time and PC resources and often does a lot of senseless work.

2.      Incremental data back-up

It processes only file that appeared or changed since the previous back-up. They may be of two reasons. When files are written on the same folder where the full back-up is or when files are put into a separate folder.

3.      Differential back-up

Its very much like incremental back-up with the only difference that it doesn’t upgrade the index file with each task execution and therefore each task execution process or modification since the last full back-up.

4.      Mirror back-up

It’s identical to full back-up with the exception that the files are not compressed in zip files and they cannot be protected with a password. This type of back-up is most frequently converted to create an extra source of the data.Note: The first time when it runs mirror back-up will back-up everything without archiving only new or modified remain.

Summary table of the four types of back-ups:

Back-up type	Data backed-up	Back-up time	Restore time	Storage space
Full back-up	All data	Slowest	Fast	High
Incremental back-up	Only new/modified files/folders	Fast	Moderate	Lowest(Best)
Differential back-up	All data since last full back-up	Moderate	Fast	Moderate
Mirror back-up	Only new/modified file/folders	Fastest	Fastest	Highest