I'm on a physical machine via KVM virtual out a centos7.2, manual upgrade the kernel to 4.20; Then mount the ceph block device to/data directory,
After manual umount, reboot, normal into the operating system;
Not umount, reboot, directly into the operating system, an error is as follows:



Virtual a centos7.2 again, the kernel is 3.10, retry the above steps, the same result, prove that has nothing to do with the kernel, what reason be?