RAID 10 basic overview
1, AID 10 is actually the standard RAID 0 and RAID 1 combined with the product, in order to continuously divided in units of bits or bytes of data and concurrent read / write multiple disks simultaneously, one for each redundant disk as disk mirroring . It also has the advantage of superior speed RAID 0 and RAID 1 data of high reliability.
2, 10 RAID disk array CPU utilization rate is also higher, and disk utilization is relatively low. As the use of very high read and write RAID 0 and RAID 1 higher efficiency of data protection and recovery capabilities to enable RAID 10 become a high level of cost-effective, almost all RAID controllers support this level.
3, RAID 10 storage capacity utilization and RAID 1 as low as only 50%.
Disk array configuration RAID 1 0
1, add 4 to the virtual machine disk, and then try to update the system. 
2, the newly added sdb, sdc, sdd, sde configuration provided to the partitioning of raid format type. 
3, the disk is divided into two groups, were created raid1 volume. 
Which
mdadm: command word
-C: create RAID volumes
-v: Displays details on
/ dev / md01: Create a file directory
-L6: level1
--n2: the number of disks is two
/dev/sd{d..e}1 : disk and directory names
4, this time raid1 volume is created, you need to create raid0 volume. 
5, RAID 0 volume format, the file system is formatted xfs format. 
6, and then create a folder inside mnt as a mount point for raid0 to mount. 
7, it can also be mounted automatically.