During the last two nights we had mysterious events on a server running Ubuntu Linux 12.04 LTS with a Linux mdadm software RAID10:
DeviceDisappeared /dev/md0
NewArray /dev/md127
Both messages appeared in the same second, on the same time as the logrotate
cron action happened. Although the array is still named /dev/md0
in /etc/mdadm/mdadm.conf
, it appears as /dev/md127
in the output of cat /proc/mdstat
:
Personalities : [linear] [multipath] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md127 : active raid10 sdb1[0] sdg1[5] sdc1[1] sdh1[6] sdf1[4] sdd1[2] sdk1[9] sdj1[8] sde1[3] sdi1[7]
9746600960 blocks 512K chunks 2 near-copies [10/10] [UUUUUUUUUU]
unused devices: <none>
Why is this so and how can I fix this?