Shulou(Shulou.com)06/01 Report--

This article will explain the example analysis of raid for you in detail. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

Raid0:

Features: parallel storage, the data is divided into each hard disk, the damage of a hard disk will lead to incomplete data, unavailable

Number of disks: 1 or n

Disk capacity: the total number of disks

Advantages: high reading and writing performance

Disadvantages: no redundancy and backup, low security

Application environment: places with low security requirements, such as graphics workstations

Raid1

Features: mirror storage, that is, each disk is written to the same data to ensure the availability and repairability of user data

Number of disks: 2 or more

Disk capacity: 50%

Advantages: high security of disk data

Disadvantages: low read and write performance and high cost

Raid5

Features: parity storage, which can also be described as a compromise between 0 and 1

Number of disks: 3 or more

Total disk capacity (nMel 1) / n (n represents the number of disks)

Advantages: improved read and write performance, improved disk data security due to parity

Disadvantages: due to the need to take out a disk for parity, the disk capacity is reduced.

Raid10

Features: it not only has the mirror image security function, but also has the same storage function as 0.

Number of disks: 4 or more

Disk capacity: 50% of total disk capacity

Advantages: improved read and write performance, redundancy using replication, and improved security mechanism

Disadvantages: disk capacity shrinks

Raid01

Features: storage before mirroring

Number of disks: 4 or more

Disk capacity: 50% of total disk capacity

Advantages: improved read and write performance, redundancy using replication, and improved security mechanism

Disadvantages: disk capacity shrinks

The difference between raid10 and raid01

Raid 10 mirrors first and then stripes, that is, the hard disk is mirrored vertically and then striped horizontally. In this case, the raid group will not crash as long as several hard drives in the same mirror group fail at the same time.

Raid 01 is striped first and then mirrored, that is, the hard disk is striped horizontally, and then mirrored vertically. In this case, as long as the hard drive is not down on both stripes, the entire raid group will not crash. Regardless of whether the two hard drives with media damage are mirror disks or not. That is, the hard drives of different stripe groups cannot be broken at the same time.

The failure probability of raid 01 is greater than that of raid 10.

This is the end of this article on "sample Analysis of raid". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.