Backups

=__Backup and the need of taking it__ =

Backup refers to making copies of data so that these additional copies may be used to restore the original data after a data loss.

The backup is used for 2 purposes. 1. Torestore a state following a disaster (called disaster recovery). 2. To restore small numbers of files after they have been accidentally deleted or corrupted. Data loss is something that happens commonly. Since a backup system contains at least one copy of data worth saving, the data storage requirements are considerable. Organizing this storage space and managing the backup process is a complicated undertaking. A data repository model can be used to provide structure to the storage.

__ Base of Backup: Storage __
Backup is started with the idea of data repository. The backup data needs to be stored somehow and probably should be organized to a degree. It can be as simple as a sheet of paper with a list of all backup tapes and the dates they were written or a more sophisticated setup with a computerized index, catalog, or relational database.

Backup can be anywhere you save your files just incase. For example, it can be in your computer on the separate hard disk called Backup, or elsewhere such as USB sticks, CDs, and all the other storage devices.

__ Why is it needed? __
Backup is basically needed for ‘Back Up’ as it says. Its to keep important files saved as backup just incase your original piece goes missing, deleted, lost.

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__Backup, Then and Now__
The first computer backups were made onto big reels of Magnetic Tapes, and even paper: punch cards and paper tape. In the next era, backups were mostly stored on floppy disks of various sizes. But today’s PCs don’t even have floppy drives, not to mention punch card processing devices. Backups are now written on CDs, hard drives, flash drives or via network. But some technologies, such as tape backup, still remain very popular and develop. ​