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Backup Solution
Backup refers to making copies of data so that these additional copies may be used to restore the original after a data loss event. Backups are useful primarily for two purposes. The first is to restore a computer to an operational state following a disaster. The second is to restore small numbers of files after they have been accidentally deleted or corrupted.
Storage media
1. Magnetic tape
Magnetic tape has long been the most commonly used medium for bulk data storage, backup, archiving, and interchange. .
2. Hard disk
The capacity/price ratio of hard disk has been rapidly improving for many years. External disks can be connected via local interfaces like SCSI, USB or FireWire. .
3. Optical disc
A recordable CD can be used as a backup device. They can be restored on any machine with a CD-ROM drive. Many optical disk formats are WORM type, which makes them useful for archival purposes since the data cannot be changed. Other rewritable formats can also be utilized such as CDRW or DVD-RAM. The newer HD-DVDs and BluRay Disks dramatically increase the amount of data possible on a single optical storage disk.
4. Solid state storage
Also known as flash memory, thumb drives, USB flash drives, CompactFlash, SmartMedia, Memory Stick, Secure Digital cards, etc., these devices are relatively costly for their low capacity, but offer excellent portability and ease-of-use.
5. Remote backup service
Backing up via the internet to a remote location can protect against some worst-case scenarios such as fire, flood, earthquake or nuclear strike which would destroy any backups in the immediate vicinity along with everything else. A drawback to a remote backup service is that an internet connection is usually substantially slower than the speed of local data storage devices, so this can be a problem for people with large amounts of data. It also has the risk associated with putting control of personal or sensitive data in the hands of a third party.
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