Talking about the features of RAID at all levels

First of all, a general idea of raid

disk array: RAID (Redundant array of independent Disks) RAID arrays are composed of several inexpensive, low-performance, slow, and robust hard drives that combine logical operations into a single overall storage system structure, To achieve higher performance storage requirements.

The RAID level is broadly divided into: RAID0,RAID1,RAID3,RAID5,RAID10

Common raid is: RAID0,RAID1,RAID5,RAID10

Here is a detailed description of several commonly used raid combinations:

RAID0:

It has high storage performance but no fault tolerance, but requires at least two disks. Higher access speeds are achieved by simultaneous reads of multiple disks . RAID 0 first considers the speed and capacity of the disk, the security is not high, as long as one of the disks out of the problem the entire array of data will be destroyed.

RAID1:

It has improved read performance, but write performance has decreased, there is a certain degree of fault tolerance, at least two or more disks required. The principle is that writing content to each disk is highly secure, but the disadvantage is that the cost of storage is high.

RAID5:

Its read and write performance has been improved, fault-tolerant, at least 3 pieces of disk, is a combination of relative raid0 and RAID1, while performing parity, its disk space utilization is higher than RAID1, but the cost is relatively low.

RAID10:

Its read and write performance has been improved, fault-tolerant, each group of images can only be bad piece, storage data volume, security high, at least 4 disk, it is the array to do RAID1 first combination, and then do RAID0 combination.

Talking about the features of RAID at all levels