Commonly used RAID learning
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
