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In information technology, a backup, or the process of backing up, refers to the copying and archiving of computer data so it may be used to restore the original after a data loss event. The verb form is to 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 can be a common experience of computer users; a 2008 survey found that 66% of respondents had lost files on their home PC. 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 represent a simple form of disaster recovery, and should be part of any disaster recovery plan, backups by themselves should not be considered a complete disaster recovery plan. One reason for this is that not all backup systems are able to reconstitute a computer system or other complex configuration such as a computer cluster, active directory server, or database server by simply restoring data from a backup.
Since a backup system contains at least one copy of all data considered worth saving, the data storage requirements can be significant. Organizing this storage space and managing the backup process can be a complicated undertaking. A data repository model may be used to provide structure to the storage. Nowadays, there are many different types of data storage devices that are useful for making backups. There are also many different ways in which these devices can be arranged to provide geographic redundancy, data security, and portability.
Before data are sent to their storage locations, they are selected, extracted, and manipulated. Many different techniques have been developed to optimize the backup procedure. These include optimizations for dealing with open files and live data sources as well as compression, encryption, and de-duplication, among others. Every backup scheme should include dry runs that validate the reliability of the data being backed up. It is important to recognize the limitations and human factors involved in any backup scheme.
Used SureFire EB1 Backup 200 Lumens. Light has small amount of wear around tail-cap
See it here: SureFire EB1 Backup Flashlight - Shoot Straight
$50 or trade factory 9mm, .38, .40, 9by 18 mak. ammo.
Brand New in Box MGW 309 sight instillation tool for Glocks
see it here: MGW Rear...
Good shape, no hard use just a few trips to an indoor range in a nice padded bag. Most importantly these sights work well.
Pickup in Gresham.
Cannot split a set and no trade interests at the moment.
I bought an extra pair from a gun a show a couple years ago but dont need it. The pair I do use on my ar pistol works perfect and has no issues after thousands of rounds.
Price is $20 firm for the set front and rear.
Located in Clackamas but also am available weekdays in downtown Portland.
Thinking of buying a backup camera for my truck I am getting tired of climbing in and out of the truck to see how close the hitch is to the boat trailer.
What does everybody else use there seem to be a lot of them out there to choose from.
For example, you carry a Glock 22, do you carry a backup gun that is a Glock 27 or something else, different caliber, different type of gun altogether? Or do you not carry a BUG at all? Why or why not?
I personally don't carry a BUG. I'm just curious.
Up for sale is a complete set of front and rear backup micro iron sights made by Knights Armament. These Each retail for just over $150 each making the set just over $300 retail. They are great irons and show a little sign of wear but nothing that would hinder the ability of them to work. I am...