Fail event on /dev/md0:ari.int.autonlab.org

[mdadm monitoring]

This is an automatically generated mail message from mdadm
running on ari.int.autonlab.org

A Fail event had been detected on md device /dev/md0.

It could be related to component device /dev/sdd.

Faithfully yours, etc.

P.S. The /proc/mdstat file currently contains the following:

Personalities : [raid1] [raid6] [raid5] [raid4] 
md125 : active raid1 sda3[0] sdc3[1]
      878905344 blocks super 1.2 [2/2] [UU]
      bitmap: 0/7 pages [0KB], 65536KB chunk

md0 : active raid6 sde[1] sdf[2] sdb[0] sdd[3](F)
      7813774336 blocks super 1.2 level 6, 512k chunk, algorithm 2 [4/3] [UUU_]
      bitmap: 0/30 pages [0KB], 65536KB chunk

md126 : active raid1 sda2[0] sdc2[1]
      976832 blocks super 1.0 [2/2] [UU]
      bitmap: 0/1 pages [0KB], 65536KB chunk

md127 : active raid1 sda1[0] sdc1[1]
      58593280 blocks super 1.2 [2/2] [UU]
      bitmap: 1/1 pages [4KB], 65536KB chunk

unused devices: <none>