A disk array introduction
1, RAID redundant array of disks called home chain.
Supplementary: uname -a (all detailed information) (- r / -m / -p ): Viewing the kernel
Linux: XX (the major version number): YY (minor version number): ZZ (End (revised) version number)
YY: kernel development board is odd, an even number is the stable core
Check the operating system version
（1）cat /etc/redhat -release
（2）lsb_release
2, RAID Level Description
（1）RAID 0
Called banding pattern, the continuous parallel access to data across multiple disks.
Disadvantages: easy to lose
Advantages: speed read and write
The number of disks: a minimum of two
Space available: All
Number of disk failure: 0