Virtual NAS, disk arrays, and the like can be used in backup situations. A storage area network (SAN) is a configuration of storage devices, governed by a controller, for centralized storage attached to a network.īackup storage devices may also be virtualized. A disk array has a number of storage drives in a single device, typically more than NAS. NAS has multiple drives in a single device for a larger amount of storage. Networked-attached storage (NAS) has a direct network connection to the device it’s backing up. Optical disc formats include DVD and Blu-ray.External drive types include hard disk drives (HDDs) and SSDs.Tape storage involves physical tapes that store digital data, like Linear Tape-Open (LTO).Removable storage temporarily connects directly to a device, then is transported to a different location. Here are some examples: Organizations typically use a combination of storage types for their data backups. It can also be standalone or exist as part of a storage array. Backup data storage may be fixed or portable, physical or virtual, and on premises or in the cloud. This depends on the medium and protocols used, including object, block, or file-based storage. Rather than having backup copies live on forever and take up storage space, organizations can also schedule backup destructions with their backup software.ĭifferent storage types can store data in different ways. They then track metrics like mean time to recovery. Organizations test their backup data solutions by simulating recovery from a system (or systems) failure. It can be accessed like the original data. Mirror backupĪ mirror backup is stored in a non-compressed format that mirrors all the files and configurations in the source data. Differential backupĭifferential backups copy any data since the last full backup, regardless of whether another backup has been made with any other method in the meantime. Reverse incremental backups add any changed data to the last full backup. Incremental backups copy any data that has been changed since the last backup, regardless of the last backup method. Synthetic full backups create full backups from a full backup plus one or more incremental backups. Each method has its benefits and shortcomings.įull backups take a full copy of all the data each time, stored as it is or compressed and encrypted. Some methods back up a full copy of the data each time, while others only copy new changes to the data. Next we discuss how data backup methods and backup testing work.ĭata can be backed up by various methods. The copying process from live to backup storage also depends on the storage type and technologies you use. The schedule may include different methods and storage types for optimal coverage and cost. You can then schedule regular backups with backup software to ensure critical data copies are up to date. The data backup process starts with identifying and prioritizing the criticality of an organization’s data and systems. Data backup and recovery capability strengthens the organization's position during audits, and ensuring it provides evidence of data integrity and compliance. They may impose specific data backup mechanisms as requirements to meet data protection standards. Various legislation and industry standards worldwide require businesses to protect sensitive data and retain it for specified periods. Organizations can restore a point-in-time system snapshot if they prefer it to the current state. It proves useful when certain changes made to the system lead to undesirable outcomes. Version history, while not the main goal of data backup, is a beneficial side effect. By being able to provide uninterrupted service or a basic level of service during a disaster, you help maintain customer trust at all times. Organizations that have contracted agreements in place-such as service level agreements, partnership agreements, and vendor agreements-continue to fulfill the terms of these agreements, even during a disaster. With an appropriate, comprehensive data backup and recovery plan in place, organizations can prepare for issues in advance and maintain their business reputation. Business reputation damage can be as difficult, if not more difficult, to recover from than an actual disaster. System downtime can cost organizations a lot in wasted time and missed opportunities. We provide some more data backup benefits next.
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