Shulou(Shulou.com)06/03 Report--

A brief statement

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

Disk array is composed of many independent disks into a disk group with huge capacity, which uses the addition effect produced by individual disks to provide data to improve the performance of the whole disk system. Using this technology, the data is cut into many sections and stored on each hard disk.

The disk array can also use the concept of parity check (Parity Check) to still read the data when any hard disk in the array fails, and when the data is reconstructed, the data will be calculated and re-placed into the new hard disk.

RAID 0 is called striped storage, as shown in the following figure, it continuously splits data in bits or bytes and reads / writes in parallel on multiple disks, so it has a high data transfer rate, but it has no data redundancy, so it is not a true RAID structure.

RAID 0 requires at least two or more hard drives of the same size. it merges more than two hard drives into one, and the data is continuously divided on each disk. The capacity is the sum of all the hard drives.

RAID 0 simply improves performance and does not guarantee the reliability of data, and the failure of one of the disks will affect all data, so it can not be used in situations with high data security requirements.

RADI O disk array creation

Add three hard drives (only two) to the virtual machine. The process can be found in the above blog, please see

First create a partition for the hard disk c / b

After the primary partition is created, convert the partition format to Linux radi

After two hard disks are partitioned, create RAID 0 volume

View details after creation

Or view (display process) with the following command

Format RAID 0 volumes, set the file system to xfs format, and mount

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