backup types

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backup types

There are two categories of backup: system backup and file backup. System backup copies everything verbatim on the hard drive onto an external storage medium, including the operating system, applications and data. If the drive fails, the computer can be restored to its former state.

File backup copies only data files onto an external storage medium. If the drive fails, the OS and applications have to be re-installed. Following are the various types.

Full and Differential Backups
A full backup copies all selected files. A differential backup copies only files that have changed since the last backup.

Incremental and Delta Backups
When each revision of a file must be maintained, an incremental backup appends selected files to the backup medium and does not replace existing backup files. A delta backup is similar to an incremental backup but copies only the changed data within the selected file, not the entire file (it backs up the differences). See deduplication, backup software and cloning software.
References in periodicals archive ?
Another trend we're witnessing is the implementation of solid file backup by companies.
com)-- Novosoft, a multinational firm which specializes in software production and IT consulting, represented an annual summary on the most significant file backup tendencies in 2011 and directions for backup tools and systems in 2012.
Key features include targeted file backup (stores only specified files and reduces wasted disk space) and file versioning, which backs up a history of files and allows the retrieval of previous versions.
The company said that Webroot Internet Security Essentials delivers anti-virus, anti-spyware, two-way firewall, disk clean-up and local and on-line file backup technologies in an integrated security suite.
Communications company BellSouth (NYSE:BLS) has announced the launch of data file backup and remote access applications for small businesses.
Traditional tape backup software has been designed for file backup and recovery.
It provides users with the functions of DVD playback, authoring, burning, slide show creation, photo retouching and file backup.
In addition, the suite includes Dantz Retrospect Express Backup for easy file backup, and Aladdin System's Spring Cleaning to remove unneeded files and folders.
The three-year agreement between SkyDesk and Excite@Home names SkyDesk as the exclusive file backup vendor for the @Home service, giving @Home subscribers the option to subscribe to @Backup for secure online file backup.
In addition to the new suite, the company announced that the latest versions of the award-winning Webroot AntiVirus with AntiSpyware and Webroot Spy Sweeper[R] products will now include online file backup to protect digital photos and other valuable files.
In addition, the drive also comes integrated with a version of EMC Dantz Retrospect Express HD Server software, with open file backup support and Maxtor's own interface for easy drive management, as well as Maxtor DriveLock technology to password protect the contents of the drive.
Di Cenzo brings up the example of Avamar, which does file backup, but doesn't have agents for Exchange or Oracle.