Hi All, When I restart mdmonitor service, a notify email will be received, which indicate DeviceDisappeared event happened for RAID0, is this phenomenon reasonable? Could anyone explain this? The email info as below ...... Host : host3.com Event : DeviceDisappeared MD Device : /dev/md1 ...... [root@host3 ~]# service mdmonitor restart Killing mdmonitor: [ OK ] Starting mdmonitor: [ OK ] [root@host3 ~]# [root@host3 ~]# cat /proc/mdstat Personalities : [raid1] [raid0] md1 : active raid0 sda1[1] sdb1[0] 927933312 blocks super 1.2 64k chunks md2 : active raid1 sdc1[1] sde1[0] 292836160 blocks super 1.2 [2/2] [UU] bitmap: 0/2 pages [0KB], 131072KB chunk md0 : active raid1 sdf1[0] sdg1[1] 488254272 blocks super 1.2 [2/2] [UU] bitmap: 0/2 pages [0KB], 131072KB chunk unused devices: <none> [root@host3 ~]# [root@host3 ~]# uname -r 3.2.28-11.el6.x86_64 [root@host3 ~]# [root@host3 ~]# mdadm -V mdadm - v3.2.5 - 18th May 2012 [root@host3 ~]# Thanks in advance. Johnson Yan -- 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