1. In addition virtual machine hard disk 4.
2. Use the mdadm command to create RAID10, named "/ dev / md0".
3. Format and mount using
4. Check / dev / md0 device information
5. simulates the case where a hard disk is damaged
6. After the damage is still normal use
Because RAID10 level can be allowed after a failed disk in a group of RAID1 hard disk without affecting the use, it still can be a normal create or delete files.
Let the hard drive sdb reinstated: the implementation of "mdadm / dev / md0 -a / dev / sdb" reboot.