Shulou(Shulou.com)06/01 Report--

1. What is RAID

RAID (Redundant Arrays of Independent Disks) disk array, which means "redundant array of independent disks".

2. Summary of several common RAID

Common RAID

Minimum number of hard disks realized

Hard disk utilization

redundancy

Speed

RAID0 (stripe storage)

two

100%

If one disk is bad, all data will be lost.

Come on!

RAID1 (mirrored storage)

two

50%

Bad data will not be lost on a hard disk.

Slow

RAID5

three

The capacity of a disk is stored with parity codes

At most one hard disk can be damaged without losing data.

Slow

RAID6

four

The capacity of the two disks is stored with parity codes

Up to two hard drives can be damaged without losing data.

Slow

RAID0+1

four

50%

Same as RAID1

Moderate

RAID10

four

50%

Same as RAID1

Moderate

3. Common centralized RAID diagrams

Https://www.cnblogs.com/rainbow70626/p/5005888.html

Http://blog.csdn.net/lidan3959/article/details/8594128

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