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This article mainly introduces the example analysis of RAID disk array, which is very detailed and has certain reference value. Friends who are interested must finish it!

RAID is the abbreviation of Redundant Array of Independent Disks, which means independent redundant disk array.

As the name implies, the role of RAID is to array multiple independent disks (hard drives) and provide redundancy to improve the reliability of data.

The reason why users attach importance to RAID lies in the three advantages of RAID: it can provide higher read and write speed than a single hard drive, increase the space for the use of a single drive letter, and ensure high reliability.

It looks good, but that's where the problem lies. A lot of cute new people only see that many players in the Tieba forum show the reading and writing speed of RAID 0, so that the mechanical disk can surpass the performance of the solid-state hard disk. Are you ready to move?

It is important to note, however, that RAID 0 is not really RAID, it simply increases disk speed without data redundancy, and if one disk is damaged, the data on all disks will suffer.

What really has data redundancy is a variety of disk arrays from RAID 1 to RAID 7, of which RAID3 and RAID5 are commonly used by gamers. Let's take a look at these two arrays in detail.

RAID 3 distributes data into pieces on different hard disks, using simple parity, and using a single disk to store parity information.

If a disk fails, the parity disk and other data disks can regenerate the data; if the parity disk fails, it does not affect the use of data, but its deficiency is that the performance of random read and write is slightly poor.

RAID 5 is similar to RAID 3, except that data and parity information are accessed across all disks.

Disk failures in RAID 5 also do not affect data usage, and read / write pointers operate on array devices at the same time, providing higher data traffic.

Other RAID methods, such as RAID 1, have only 50% of the disk capacity available, and RAID 6 seriously affects the write speed because it requires two separate parity blocks, and the usage environment is very limited.

After understanding the characteristics of RAID, we can find that different RAID methods have a feature, that is, under the same disk capacity, the higher the security performance, the smaller the available capacity, and RAID has higher requirements for hard disk, so the recommended hard disk will be more expensive.

In other words, although RAID can achieve higher read and write speed and data redundancy, it needs higher cost to implement, and it takes a lot of time and cost in the early and later stages, which is not as "fragrant" as you think.

So the question is, should you use disk arrays? For most players, RAID is not required.

Using extra money to buy hard drives to expand disk space and regularly backing up important data is a better solution. Small files that don't have to worry about privacy can also be stored in the cloud.

If you have special professional needs, or need to build your own server, do not rashly build RAID, but choose your own RAID solution, and enjoy the convenience brought by RAID while doing a good job of data security.

The above is all the contents of the article "sample Analysis of RAID disk Array". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

Original address: https://news.mydrivers.com/1/741/741475.htm

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