I received this error:
This is an automatically generated mail message from mdadm running on host.xx.xx
A Fail event had been detected on md device /dev/md2.
It could be related to component device /dev/sda2.
Faithfully yours, etc.
P.S. The /proc/mdstat file currently contains the following:
Personalities : [raid1] md2 : active raid1 sdb2[1] sda2[2](F) 523200 blocks [2/1] [_U] md4 : active raid1 sdb4[1] 1901261760 blocks [2/1] [_U] bitmap: 5/15 pages [20KB], 65536KB chunk md3 : active raid1 sdb3[1] 51198912 blocks [2/1] [_U]
unused devices:
Then I received this other email:
Subject: FailedOpenDevice
Device: /dev/sda [SAT], unable to open device
How can I know if I have a problem in one of the 2 disks I have?
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Answer
How can I know if I have a problem in one of the 2 disks I have?
FailedOpenDevice Device: /dev/sda [SAT], unable to open device
You have a problem with your /dev/sda. You see sda2[2](F) in your mdstat, that (F) means that that disc (/dev/sda2) is faulty. See your dmesg for further errors.