Backing up online is essential and should be done daily
Backup data is a term used in information technology. A back up or the process of backing up is making copies of data which may be used to restore the original after a data loss event. The verb form is back up in two words, whereas the noun is backup.
Backups have two distinct purposes. The primary purpose is to recover data after its loss, be it by data deletion or corruption. Data loss is a very common experience of computer users. 67% of internet users have suffered serious data loss. The secondary purpose of backups is to recover data from an earlier time, according to a user-defined data retention policy, typically configured within a backup application for how long copies of data are required.
Though backups popularly represent a simple form of disaster recovery, and should be part of a disaster recovery plan, by themselves, backups should not alone be considered disaster recovery. Not all backup systems and/or backup applications can reconstitute a computer system. Secure backups include options like off-line storage which requires some direct human action in order to make access to the storage media physically possible. This action is typically inserting a tape into a tape drive or plugging in a cable that allows a device to be accessed. Because the data is not accessible via any computer except during limited periods in which it is written or read back, it is largely immune to a whole class of on-line backup failure modes. Access time will vary depending on whether the media is on-site or off-site. Off-site data protection To protect against a disaster or other site-specific problem, many people choose to send backup media to an off-site vault. The vault can be as simple as a system administrator\'s home office or as sophisticated as a disaster-hardened, temperature-controlled, high-security bunker that has facilities for backup media storage. Importantly a data replica can be off-site but also on-line (e.g., an off-site RAID mirror). On-line backup storage is typically the most accessible type of data storage, which can begin restore in milliseconds time. A good example would be an internal hard disk or a disk array (maybe connected to SAN). This type of storage is very convenient and speedy, but is relatively expensive. On-line storage is quite vulnerable to being deleted or overwritten, either by accident, by intentional malevolent action, or in the wake of a data-deleting virus payload.
A back up or the process of backing up is making copies of data which may be used to restore the original after a data loss event. The verb form is back up in two words, whereas the noun is backup. Backups have two distinct purposes. The primary purpose is to recover data after its loss, be it by data deletion or corruption. Data loss is a very common experience of computer users. 67% of internet users have suffered serious data loss. The secondary purpose of backups is to recover data from an earlier time.