Raid0_raid1_raid10_raid5 each need a few pieces of disk to be able to assemble

RAID 0
RAID 0 is datastripping (data-striped technology). The data of the entire logical disk is distributed across multiple physical disks by a stripe (stripped), which can be read/written in parallel, providing the fastest speed, but without the redundancy capability. Requires a minimum of two disks. We can get larger capacity of a single logical disk through RAID0, and get higher access speed by simultaneous reads to multiple disks. RAID0 the first consideration is the speed and capacity of the disk, ignoring the security, as long as one of the disks is out of the question, then the entire array of data will be out of warranty.
Q: RAID0 at least a few plates?
A: RAID0 requires a minimum of two hard drives to achieve.
RAID 1
RAID 1, also known as mirroring mode, is the redundancy of the data. During the entire mirroring process, only half of the disk capacity is valid (the other half of the disk capacity is used to hold the same data). Compared with RAID0, RAID1 first considers the safety, the capacity is halved, the speed is invariable.

Q: RAID1 at least a few plates?
A: RAID1 requires a minimum of two hard drives to achieve.
RAID 0+1
In order to achieve both high speed and security, RAID10 (or raid0+1) can be seen, the RAID10 is simply understood as a RAID0 array composed of multiple disks to mirror.
Q: raid0+1 at least a few hard drives can be implemented.
A: raid0+1 requires at least 4 disks.
RAID 3 and RAID5
Both RAID 3 and RAID5 are checksum modes. RAID3 works by storing the checksum data with a disk. Because any data changes to modify the corresponding data check information, the disk that holds the data has several and parallel work, and the disk that holds the check data is only one, which brings the bottleneck of verifying data storage. RAID5 's work is to check the data generated by each disk into blocks, respectively, into the various disks that make up the array, which alleviates the bottleneck problem when the data is stored, but the cost of splitting the data and controlling the storage will be paid at a speed.
Common problems
Q: How many hard drives does RAID5 need? Why is the volume of a disk lost?
Answer: at least 3 bucks
RAID5 stores the data and the corresponding parity information on each disk that makes up the RAID5, and the parity information and the corresponding data are stored on separate disks, where the full data is stored on any N-1 block disk, meaning that there is space equivalent to a disk capacity for storing parity information. Therefore, when a disk in RAID5 is damaged, the data integrity is not affected, thus ensuring data security. When the damaged disk is replaced, the raid also automatically rebuilds the data on the disk with the remaining parity information to maintain the RAID5 's high reliability.

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Raid0_raid1_raid10_raid5 each need a few pieces of disk to be able to assemble