The raid is a data technology that allows several hard disks to be combined into a single system for several purposes.

It may allow the user to implement better performance and reliability than any of the disks could achieve on its own.

The raid systems are either based on hardware, such as raid controller or raid card, or software raid (mdraid).

This article talks about raid data recovery of raid hardware.

Let's first talk about raid controllers or raid cards. Raid cards are microchips that are added to the motherboard of a computer. They have different functions, but one of their most important functions is to control raid arrays. A raid array is formed by combining several hard disks into a raid set. The raid card manages all aspects of the raid, including the reading and writing of data to/from the hard disks.

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