The difference between raid0+1 and raid1+0

The difference between raid0+1 and raid1+0

Requires 4 hard drives
DISK1, DISK2, DISK3, DISK4

A raid0+1

Raid0+1 can not RAID0 each side of the bad hard disk, but can be unilateral at the same time the unilateral two hard drive.
Reason: If DISK1 a1,disk a2,disk3 B1, DISK B2
A (A1,A2) B (B1,B2)
1. If any of the hard drives in A and b are broken, it destroys the RAID0 technology. All the whole
Hard drive data is corrupted. Therefore, any one of the block drives in A and B cannot be damaged at the same time.
2. All of the hard drives in a are broken because the RAID0 format in B remains intact because the
Raid0+1,i does not affect the integrity of the data. Therefore, all disks in a are allowed to be corrupted. Same as B.
Such.

Two raid1+0

Raid1+0 can both sides of the RAID1 bad one hard drive, but not at the same time to break the unilateral two hard drives.
Reason: 1. Any one of the hard drives can be bad, because the RAID1 format is done, and any one in B
Hard disk data can also be bad, because it is also done in RAID1 format. So allow A and B
What piece of hard disk is damaged at the same time does not affect the integrity of the data.
Two blocks in 2.A (b) are damaged at the same time, as you can see from the figure, the data cannot remain intact.
To not allow unilateral two hard drives to be damaged at the same time.
The above raid0+1,raid1+0 diagram is as follows:

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Go to your own space, forget to look again.
At the beginning, thought Raid1+0 is raid10,raid0+1 is RAID01, but on the internet to see more things also found the opposite opinion, not sure. Today I finally decided that I was right at the beginning of my understanding.

And get an article from Intel online about what a RAID 10 is.

The raid 10 array uses four hard drives to create a combination of RAID 0 and RAID 0 by using two RAID 1 arrays to form a RAID 1 array.

Because all data on a RAID 0 array is replicated, the storage capacity of the raid 10 array is the capacity of the raid 0 array. For example, the four GB hard disk in the AID 10 array is like a GB hard disk for the operating system.

The primary benefit of RAID 10 is the combination of RAID 0 performance and the benefits of RAID 1 fault tolerance. In the case of a hard drive failure, it can provide good data protection capabilities. When one hard drive fails, all data is immediately available from the other half of the mirrored disk, thereby compromising data integrity. In the event of a disk failure, the computer system is fully operational, ensuring maximum productivity. Data fault tolerance can be recovered by replacing the failed hard drive.

The performance of a RAID 10 array is better than a single drive because the data can be read from multiple disks at the same time. RAID 10 is more readable than dual-disk RAID 0 because the data can be read from any half of the mirrored disk, but the write functionality is slightly reduced because of the need to ensure that the data is fully written to the array.
Article from: http://www.intel.com/support/cn/chipsets/imsm/sb/CS-020655.htm