Editing Backup (section)

===Management===
Various methods can be used to manage backup media, striking a balance between accessibility, security and cost. These media management methods are not mutually exclusive and are frequently combined to meet the user's needs. Using on-line disks for staging data before it is sent to a near-line [[tape library]] is a common example.<ref name="StackpoleSoftware07">{{cite book |url=https://books.google.com/books?id=gjAhVzuV7k0C&pg=PA164 |title=Software Deployment, Updating, and Patching |author=Stackpole, B. |author2=Hanrion, P. |publisher=CRC Press |pages=164–165 |year=2007 |isbn=978-1-4200-1329-0 |access-date=8 May 2018}}</ref><ref name="GnanasundaramInfo12">{{cite book |url=https://books.google.com/books?id=PU7gkW9ArxIC&pg=PA255 |title=Information Storage and Management: Storing, Managing, and Protecting Digital Information in Classic, Virtualized, and Cloud Environments |editor=Gnanasundaram, S. |editor2=Shrivastava, A. |publisher=John Wiley and Sons |page=255 |year=2012 |isbn=978-1-118-23696-3 |access-date=8 May 2018}}</ref>

====Online====
[[Online]] backup storage is typically the most accessible type of data storage, and can begin a restore in milliseconds. An internal hard disk or a [[disk array]] (maybe connected to [[Storage area network|SAN]]) is an example of an online backup. This type of storage is convenient and speedy, but is vulnerable to being deleted or overwritten, either by accident, by malevolent action, or in the wake of a data-deleting [[Computer virus|virus]] payload.

====Near-line====
[[Nearline storage]] is typically less accessible and less expensive than online storage, but still useful for backup data storage. A mechanical device is usually used to move media units from storage into a drive where the data can be read or written. Generally it has safety properties similar to on-line storage. An example is a [[tape library]] with restore times ranging from seconds to a few minutes.

====Off-line====
[[Off-line storage]] requires some direct action to provide access to the storage media: for example, inserting a tape into a tape drive or plugging in a cable. Because the data is not accessible via any computer except during limited periods in which they are written or read back, they are largely immune to on-line backup failure modes. Access time varies depending on whether the media are on-site or off-site.

====Off-site data protection====
Backup media may be sent to an [[off-site data protection|off-site]] vault to protect against a disaster or other site-specific problem. 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 with facilities for backup media storage. A data replica can be off-site but also on-line (e.g., an off-site [[RAID]] mirror).

====Backup site====
A [[backup site]] or disaster recovery center is used to store data that can enable computer systems and networks to be restored and properly configured in the event of a disaster. Some organisations have their own data recovery centres, while others contract this out to a third-party. Due to high costs, backing up is rarely considered the preferred method of moving data to a DR site. A more typical way would be remote [[disk mirroring]], which keeps the DR data as up to date as possible.