Raid 0
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Feature
Lift-off, the data will be divided between several disks. A lot of data is divided into data blocks, each data block is written to a separate disk. Thus, the workload of each disk have been reduced, which helps to speed up data transfer. RAID-0 disk allows better response, especially e-mail, database and Internet applications. RAID-0 embodiment requires a minimum of two hard drives. Advantages: Through the I / O load distribution to the plurality of hard disks, system performance can be improved. Simple to implement. Note that: RAID-0 has no data protection, not suitable for critical data.
Raid 1
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Feature
RAID-1 is achieved by a disk mirroring, primarily to ensure the reliability of the data. The same data will be copied onto a different storage disk, if a disk fails, the corresponding data can be found on a disk within the array, it can be easily restored. You can create a mirror not only bring high-availability redundant data and can also maintain the normal operation of critical applications. Advantages: data read performance has improved, and the data write performance to a single disk is no different. Data does not need to be rebuilt when 100% data redundancy means that a disk failure. Note that: inefficient use of disk capacity - the highest cost of all RAID types (100%).
Raid 5
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Features RAID-5 through a technique called parity retaining redundant data. When the release data across multiple disks, and parity data is also included and distributed on all disks within the array. For holding parity data integrity and data reconstruction in the event of a disk failure. If a disk in the array fails, the lost data can be reconstructed from the parity data on the other disk. RAID-5 configuration requires at least three hard disks. Advantages: more efficient use of disk capacity of all the redundant RAID configuration. Good read and write performance. Note that: disk failure will affect the throughput rate. After reconstruction information, fault time is longer than the mirroring configuration.
Raid 6
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Features RAID6 performance:
Random read performance (1) RAID6: the well (when using large data blocks).
(2) RAID6 random write performance: poor, not only because the calibration data to be written on the hard disk but also in every special check the hard disk write data.
Continuing read performance (3) RAID6 of: Good (when using a small block of data).
Sustained Write Performance (4) RAID6: general.
Advantages (5) RAID6: Quick read performance, greater fault tolerance.
(6) RAID6 drawback: the slow write speeds, RAID controller in the design of more complex, higher cost.
Raid 1 0
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Features RAID-10 and RAID-1 is a combination of RAID-0. This configuration requires at least four drives, RAID level in all, the performance, protection and capacity are the best. RAID-10 comprises a pair of mirrored disks whose data is peeled across the array. In most cases, RAID-10 can withstand a plurality of disk failure, and therefore can guarantee the normal operation of the system. Its smallest chance of data loss. Advantages: The same redundancy and RAID-1 (mirroring) is ideal for data protection. Note that: the price may be high, and mirrored disk array related.
Raid 5 0
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Features RAID-50 and RAID-5 is a combination of RAID-0. This configuration includes the release data including parity information on each of the sub-disk RAID-5 disk group. Each RAID-5 sub-groups requires three hard disk. RAID-50 has a higher fault tolerance, because it allows a group within a disk failure without data loss. And because the parity bits on the division of the sub-disk RAID-5 group, it has greatly improved the speed of reconstruction. Advantage: higher fault tolerance, it has the potential to be read faster data rates. Note that: disk failure will affect throughput. After reconstruction information, fault time is longer than the mirroring configuration.
Raid 6 0
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It features with higher fault tolerance, repair support simultaneous failure of two hard drives, and higher read performance. Technically there are still some problems, not mature enough, at present very few users.
No get public attention more