I recently set up a new server. The OS has 2 drives on RIAD 1 and the data has 3 disks on RAID 5. I got this message from the system. Not sure what it means. It is the only one a got and it has been several days, so maybe I can ignore it.
Subject: Fail event on /dev/md0icella.net
This is an automatically generated mail message from mdadm
running on picella.net
A Fail event had been detected on md device /dev/md0.
It could be related to component device /dev/sda2.
Faithfully yours, etc.
P.S. The /proc/mdstat file currently contains the following:
Personalities : [raid1] [raid6] [raid5] [raid4]
md1 : active raid5 sde1 sdc1 sdd1
1953518592 blocks super 1.1 level 5, 512k chunk, algorithm 2 [3/3] [UUU]
bitmap: 3/8 pages [12KB], 65536KB chunk