Mdadm alert on ZFS System

[Gaojianli]

Hi All, I have received 2 alert email from my nas:

Code:

This is an automatically generated mail message from mdadm
running on nas

A Fail event had been detected on md device /dev/md127.

It could be related to component device /dev/sdb1.

Faithfully yours, etc.

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

Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md127 : active raid1 sdb1[1](F) sda1[0]
2094080 blocks super 1.2 [2/1] [U_]
[==>..................] resync = 10.9% (230784/2094080) finish=0.1min speed=230784K/sec

unused devices: <none>

However, I don't have any mdadm device on my machine, all of my 4 disks are using RAIDZ. Also, the mdstat file was empty when i cat it:

Code:

$ cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
unused devices: <none>

The GUI also shows no error for all disks:

This mail subject is "mdadm monitoring" from root, which is not the same as settings.

I wonder if this mail is really from my NAS?
Is there any wrong with my disk?
Why i received these mails?
Thanks.

 

[sretalla]

mdadm is used to create the swapfile mirrors across some (or all) of the pool disks.

cat /etc/mdadm/mdadm.conf

Will allow you to see that the mail config is potentially different to what you have in your GUI setup for email.

It's managed by the middleware and you shouldn't need to be concerned with its presence.

If there are repeated warnings like this, you may want to look into issues with your disks though. (have a look at dmesg for items talking about disks disconnecting)