Status Critical: one or more devices has experienced an unrecoverable error

[PhoenixWeb]

I see this warning as CRITICAL since today.
If I run zpool status I get the following answers:

Code:

  pool: Storage
 state: ONLINE
status: One or more devices has experienced an unrecoverable error.  An
		attempt was made to correct the error.  Applications are unaffected.
action: Determine if the device needs to be replaced, and clear the errors
		using 'zpool clear' or replace the device with 'zpool replace'.
   see: http://illumos.org/msg/ZFS-8000-9P
  scan: scrub repaired 0 in 7h51m with 0 errors on Sun Dec  3 07:51:50 2017
config:

		NAME											STATE	 READ WRITE CKSUM
		Storage										 ONLINE	   0	 0	 0
		  mirror-0									  ONLINE	   0	 0	 0
			gptid/db4a917c-6e4b-11e7-bbf3-002590fc5d78  ONLINE	   0	 0	 0
			gptid/db8ab3c6-6e4b-11e7-bbf3-002590fc5d78  ONLINE	   3   552	 0
		  mirror-1									  ONLINE	   0	 0	 0
			gptid/dbca5524-6e4b-11e7-bbf3-002590fc5d78  ONLINE	   0	 0	 0
			gptid/dc086a3e-6e4b-11e7-bbf3-002590fc5d78  ONLINE	   0	 0	 0
		  mirror-2									  ONLINE	   0	 0	 0
			gptid/2ff88870-b3e6-11e7-894c-002590fc5d78  ONLINE	   0	 0	 0
			gptid/303aae82-b3e6-11e7-894c-002590fc5d78  ONLINE	   0	 0	 0
		  mirror-3									  ONLINE	   0	 0	 0
			gptid/a2b3706f-b3e6-11e7-894c-002590fc5d78  ONLINE	   0	 0	 0
			gptid/a2f137a1-b3e6-11e7-894c-002590fc5d78  ONLINE	   0	 0	 0

errors: No known data errors

  pool: freenas-boot
 state: ONLINE
  scan: scrub repaired 0 in 0h0m with 0 errors on Mon Nov  6 03:45:07 2017
config:

		NAME		STATE	 READ WRITE CKSUM
		freenas-boot  ONLINE	   0	 0	 0
		  mirror-0  ONLINE	   0	 0	 0
			ada0p2  ONLINE	   0	 0	 0
			ada1p2  ONLINE	   0	 0	 0

errors: No known data errors

It seems that an error occur... but there is no written which device failed.
And now it seems the device is running.

Do I have to check something else?
Is this a prelude of a near-future failure?

 

[Ericloewe]

but there is no written which device failed.

Check again. The second device of mirror-0 has hundreds of errors.

Is this a prelude of a near-future failure?

It's not a prelude, that's what SMART is for. If it's not the interface acting up replace the drive.

 

[PhoenixWeb]

Hi Ericloewe,

thanks.
It wasn't clear that the table was the summary of the error, the caption report just "config:".
However now that this is it, the second drive in the first mirror is getting errors. I see too.
Ok.

I read http://illumos.org/msg/ZFS-8000-9P
This also explain that this can be a prelude of a failed driver OR a simple issue with ISCSI connection.
In the second case, the issue was due connectivity and not disk, so the number of error should not increase, right?
While in the first case the number of error should increase and increase till the failure.
Is this the right interpretation?

Also it's not clear to me which disks is which.
The disk with error is the: gptid/db8ab3c6-6e4b-11e7-bbf3-002590fc5d78
The "zpool status" place this disk in the second row in the first mirror.
I guess this is the place of the disk /sd1 (the second SAS).
But I'm not really sure it is so.

Is it any way to check & be sure which disk is which in the zpool status?

 

[Ericloewe]

https://forums.freenas.org/index.php?resources/identify-your-drives-by-serial-number.64/

https://forums.freenas.org/index.php?resources/replacing-a-failed-failing-disk.75/

 

[PhoenixWeb]

Hello again,

it pass some day.
Errors are not increased.
Can I state this was a temporary error?
Or do I have to wait more?

At the moment I have already received some new driver and I'm ready to replace those disk if necessary.
However it seems strange that a SSD disk will broke after been used only for 5 months.
Instead we had some networks disconnection some time ago due to networks upgrade.
I'm guessing what this errors come from.

 

[danb35]

I'm guessing what this errors come from.

Network issues would not explain errors in the pool.