dmesg中的信息，是什么意思？
JBD2: Detected IO errors while flushing file data on dm-0-8
怪我咯2017-04-17 13:39:52
Equipment failure. It may be that the device under the device mapper is not working, or it may be that the device mapper itself has an error.
The information you provided is so little, this is all I can do.
