Solved as follows.
There are prompted for a log journalctl: view the system log information;
Direct Input this command to view the log content may be a lot, quickly flip or directly targeted to the most recent log information, found marked red, indicating an error here.
wrong reason:
failed to mount /sysroot.
Dependency failed for Initrd root File System.
Dependency failed for Reload configuration from the Real Root.Solve the problem:
Enter the command
xfs_repair -v -L /dev/dm-0-L option specifies the mandatory log cleared, forcing xfs_repair log to zero, even if it contains dirty data (metadata changes).
PS: XFS a high performance journaling file system
