Hi Neil, Thank you for the clarification. I can remove the RAID0 MD's information from /etc/mdadm.conf to omit the monitor for RAID0, then so such event occurred when restart mdmonitor service, but the system won't re-assemble these RAID0 MD after every system reboot. Do you have any good advice? Best Regards, Johnson > Thanks Neil for always kindly help. > The device disappeared event report when restart mdmonitor service, which > will mdadm with options PIDFILE=/var/run/mdadm/mdadm.pid > PATH=/sbin:/usr/sbin:$PATH > RETVAL=0 > OPTIONS="-F -y -f -s -i $PIDFILE" > > And I checked man page of mdadm which clear claimed : > > > DeviceDisappeared > An md array which previously was configured > appears to no > longer be configured. (syslog priority: Critical) > > If mdadm was told to monitor an array which is RAID0 or > Lin- > ear, then it will report DeviceDisappeared with the > extra > information Wrong-Level. This is because RAID0 and > Linear > do not support the device-failed, hot-spare and resync > oper- > ations which are monitored. > > Thanks again for your time. > > Jack -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html