Hello,
Thanks for your question, please refer to the following information:
Definition
Redundant array of Indepenent Disk (RAID) is a data protection technology that combines multiple independent hard drives (physical hard disks) into a hard disk group (a logical hard drive) in different ways. The hard drive pool has higher storage performance than a single hard disk and provides data redundancy.
Features
Using RAID improves the storage system (or integrated server storage), especially in the transmission rate and fault tolerance feature.
Transmission speed
A RAID improves the performance of storage system data by storing data on multiple hard drives, and reading and writing data to multiple hard disks at the same time. In a RAID, multiple disk drives can transmit data at the same time. These disk drives serve as a logical disk drive. Therefore, a RAID can provide a transmission rate that is several times or hundreds of times that of a single disk drive.
Fault tolerance
With the exception of cyclic redundancy check codes (CRCs) written to disk, a common disk drive cannot provide the fault tolerance function. The RAID fault tolerance feature is implemented based on the hardware fault tolerance feature of each disk drive. Therefore, it provides greater security. Most RAID tiers provide full mutual recovery or verification measures, and some RAID levels provide direct and mutual backup or backup. These measures significantly improve RAID system fault tolerance capability and system stability.
RAID types
RAID can be divided into different levels depending on the join schemes of the disk arrays. Each tier indicates a storage technology. (A higher RAID level does not mean that storage technology is more advanced than storage technology used by a lower RAID tier). There are five standard RAID levels, RAID 0 to RAID 5, and many more variations, such as RAID 6, RAID 7, RAID 10 (RAID 1 + RAID 0), RAID 01 (RAID 0 + RAID 1), and RAID 1E (an improved version of RAID 1).
You can also check the following link to learn about storage concepts:
