In computer language, backup term means to copy files or data in a secondary medium as a precaution. So, the secondary medium can be easily used to restore the original data in the event of data loss. Backup process has two distinct purposes, which are as follows:
- To recover the data after its loss
- Recover the data from an earlier time
Data loss can be common experience for the users; where backup can be a very useful method to ensure the security of vital information or data. In more simple words, this facility represents a simple form of disaster recovery. Since backup system contains at least one copy of all data worth for saving for future reference, storage space requirements have also increased significantly.