In information technology, a backup, or the process ofbacking up, refers to the copying and archivingof computerdata so it may be used torestorethe original after a data loss event.
Backup is the activity of copying files or databases so that they will be preserved in case of equipment failure or other catastrophe.
Backup is usually a routine part of the operation of large businesses with mainframes as well as the administrators of smaller business computers. For personal computer users, backup is also necessary but often neglected. The retrieval of files you backed up is called restoring them.
Backup and recovery refers to the process of backing up data in case of a loss and setting up systems that allow that data recovery due to data loss.
Backing up data requires copying and archiving computer data, so that it is accessible in case of data deletion or corruption. Data from an earlier time may only be recovered if it has been backed up. Data backup is a form of disaster recovery and should be part of any disaster recovery plan. Data backup cannot always restore all of a system's data and settings. For example, computer clusters, active directory servers, or database servers may need additional forms of disaster recovery because a backup and recovery may not be able to reconstitute them fully.
Today, a great deal of data can be backed up when using cloud storage, which means archiving on a local system's hard drive or using external storage is not necessary. Mobile devices, in particular, can be set up using cloud technologies, allowing data to be recovered automatically.