Shulou(Shulou.com)06/02 Report--

A brief summary of the function of raid0,raid1,raid10,raid5,raid50,raid6,raid60

1 the characteristics of raid0: with split, the data will be split on several disks. The data is divided into many blocks, each of which is written to a different disk. As a result, the workload on each disk is reduced, which helps to speed up data transfer. RAID-0 makes disks more responsive, especially for email, database, and Internet applications. A minimum of two hard drives are required to implement RAID-0. Advantages: the performance of the system can be improved by distributing the Ihammer O load across multiple hard drives. It is easy to implement. It should be noted that RAID-0 does not have data protection capabilities and is not suitable for critical data.

2 the characteristics of RAID-1 1: it is realized by disk mirroring, which is mainly used to ensure the reliability of data. The same data will be copied and stored on different disks, and if a disk fails, the corresponding data can be found on a disk in the array, so it can be easily recovered. Mirroring can not only create redundant data and bring high availability, but also keep critical applications running normally. Advantages: the performance of data reads is improved, while the performance of data writes is no different from that of a single disk. 100% data redundancy means that data does not need to be rebuilt in the event of a disk failure. It is important to note that the inefficient use of disk capacity-the most expensive of all RAID types.

3 the characteristics of raid 10: RAID-10 is a combination of RAID-1 and RAID-0. This configuration requires at least 4 hard drives, and performance, protection, and capacity are the best of all RAID levels. RAID-10 contains pairs of mirrored disks whose data is split across the array. In most cases, RAID-10 can withstand the failure of multiple disks, so it is better able to ensure the normal operation of the system. The probability of data loss is the least. Advantages: it has the same redundancy as RAID-1 (mirroring) and is an ideal choice for data protection. It should be noted that the price may be high, which is related to the mirror disk array.

4Grad 5 features: RAID-5 maintains data redundancy through a technique called parity checking. When data is split on multiple disks, parity data is also included and distributed across all disks in the array. Parity data is used to maintain the integrity of the data and to rebuild if the disk fails. If a disk in the array fails, the lost data can be rebuilt based on the parity data on other disks. RAID-5 configuration requires at least 3 hard drives. Advantage: more efficient use of disk capacity in all redundant RAID configurations. Maintain good reading and writing performance. It should be noted that disk failure will affect the throughput rate. It takes longer to rebuild information after a failure than in the case of a mirror configuration.

5 the characteristics of RAID-50 50: RAID-50 is the combination of RAID-5 and RAID-0. This configuration strips data including parity information on each disk of the subdisk group of the RAID-5. Three hard drives are required for each RAID- 5 subdisk group. RAID-50 is more fault tolerant because it allows one disk in a group to fail without causing data loss. And because the parity bit is partial on the RAID- 5 sub-disk group, the reconstruction speed is greatly improved. Advantages: higher fault tolerance and the potential for faster data reading rates. It is important to note that disk failures can affect throughput. It takes longer to rebuild information after a failure than in the case of a mirror configuration.

6 the characteristics of raid6:

Performance of RAID6:

(1) Random read performance of RAID6: very good (when using big data block).

(2) random write performance of RAID6: poor, because not only check data is written on each hard disk, but also data is written on a special check hard disk.

(3) continuous read performance of RAID6: good (when using small data blocks).

(4) continuous write performance of RAID6: general.

(5) the advantages of RAID6: fast reading performance and higher fault tolerance.

(6) the disadvantage of RAID6: very slow writing speed, RAID controller is more complex in design and higher cost.

Features of 7.raid60:

It has higher fault tolerance, supports the repair function of two hard drives failure at the same time, and higher read performance. There are still some technical problems, not mature enough, few users at present.

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