1 string 1 and belong to RAID several

I can't make it. RAID0 consists of two or more hard drives, whose capacity is the sum of their respective capacities, with the advantage of fast speed, and the disadvantage of not having fault tolerance, which is often used in occasions that require high speed but low requirements for data security.

If RAID 0 is about performance at the expense of security, RAID 1 is the opposite. RAID 1 is a solution for sacrificing security at the expense of performance. This is done through system data redundancy – real-time data backups.

RAID 1 is also known as mirror or mirroring, which translates to disk mirroring, and each disk has a corresponding mirror disk. Data written to any disk will be copied to the image disk. The system can read data from any disk in a set of mirrored disks. Since space is needed to store in the image, we can only use half the space of all the disks combined, for example, two 40GB hard drives with a total capacity of 80GB will only have 40GB of usable storage.

Because if you're using disk drives of different capacities, then there might be unused capacity in the larger disk drives. Obviously, this disk image will definitely increase the cost of the system. Of course it is"Mirroring"The hard disk can also be mirrored to other storage devices, such as rewritable optical drives, and although using optical disks as mirrored disks is not as fast as using hard disks, this method reduces the risk of data loss compared to not using mirrored disks.

RAID 5, on the other hand, combines 2 of them, but with 3 hard disk packs.

2 strings are raid 0

You don't seem to be able to group.

To put it simply, these two modes use multiple hard disks to assemble into one hard disk, which has the function of data reading acceleration and security, and if one of the hard disks is damaged, the data will not be lost.

The hard disk used by RAID 0+1 costs more than RAID 5, but the write speed is faster than RAID 5. For example, the minimum requirement is that 4 hard disks are required to form RAID 0+1, which can theoretically obtain the capacity of 2 hard disks and 2 times the speed of a single hard disk. Raid5, on the other hand, only needs 3 hard disks to get the capacity and read speed of 2 hard disks, but its write speed does not get 2 times the speed, because its working principle is different, when the data is backed up, it is written to one of the hard disks that has been calculated, and the verified data can be recovered when one of the disks is damaged.

Note that the minimum hard disk capacity is used as the standard in RAID mode, so it is recommended to use a hard disk of the same capacity, and secondly, pay attention to the theory, in fact, it cannot reach 2 times the speed.

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