Since the 21st century, with the development of network, more and more enterprises begin to transform or expand online business. With the development of online business, the requirement of server stability is increasing.
For enterprise users, the damage and loss of hard disk data is a great pain. In addition, in the process of large capacity file transmission, the long waiting period is also worrying. In order to solve these problems, RAID technology came into being.
The origin of RAID technology
Raid, the English full name of redundant arrays of independent disks, that is, independent redundant disk array. The concept of raid first appeared in 1988. Professor D. A. Patterson of the University of California, Berkeley, and others proposed it in their paper “a case of redundant array of expensive disks”. In short, raid is a technology that combines multiple independent physical hard disks into a hard disk group in different ways to provide higher storage performance and data redundancy than a single hard disk.
At first, the purpose of raid research is to reduce the cost of mass data storage by combining small cheap disks instead of large expensive disks. At the same time, through the way of redundant information, it can still access data in case of disk failure, and appropriately improve the speed of data transmission.
Advantages of RAID technology
1. Improve the transmission rate. Raid greatly improves the data throughput of the storage system by storing and reading data on multiple disks at the same time. In raid, multiple disks can transmit data at the same time, and these disks are logically one disk, so using raid can achieve the speed of several times, tens of times or even hundreds of times of a single disk.
2. Provide fault tolerance. Ordinary disks can not provide fault tolerance. Raid fault tolerance is based on the hardware fault tolerance of each disk. It can provide high security. In many raid modes, there are relatively complete mutual check, corrective measures, and even direct mutual mirror backup, which greatly improves the fault tolerance of the RAID system and the stability and redundancy of the system.
Application of RAID technology
At the beginning, RAID technology was only applied to high-end servers and high-end SCSI hard disks. The most common RAID application is disk array cabinet. Disk array cabinet is a disk cabinet integrated with RAID controller. Various raid modes can be flexibly configured through RAID configuration software to meet the actual storage requirements of different users. In recent years, with the development of technology and the reduction of product cost, raid chips have been popularized and gradually extended to the field of personal computers.
For small and medium-sized enterprises, it is very important to choose a stable and reliable server that supports RAID technology.
Editor in charge: CC