RAID 10: A powerful and reassuring combination
To understand the configuration of the RAID 10, you must first study the RAID 1 and RAID 0 that compose it. Firstly, RAID 1 is a set of two hard drives, one of which is mirrored to secure the stored data. This cloning system has a high fault tolerance and is therefore suitable for storing sensitive data. RAID 0 is a system that distributes information stored on multiple hard drives by interweaving data, meaning the access time is accelerated.
RAID 10, also known as RAID 1 + 0, consists of assembling two or more RAID 1 devices into a RAID 0 array. For example, two hard drives are assembled in RAID 1, two other hard drives are assembled identically, and so on. It requires a minimum of four discs and always in even numbers. An assembled cluster forms a logical unit that will be associated with other clusters to allow interweaving as is the case of a RAID 0 system. The redundancy of data in each sub-unit ensures their security, while that the distribution of the data on several logical units accelerates the reading and the writing.
There is the reverse which is called RAID 01, the fault tolerance is less important, since a faulty RAID 0 subset impacts the entire performance.