Help diagnosing hard disk errors

[darksupernova]

Hi there,

 

I'm very new to unraid but have been taking the time to read through the docs to try and diagnose this problem. I _think_ I understand but wanted to confirm with you first before shelling out for new drives.

 

History:

• Moved two drives from Synology NAS into new unraid system (formatted them)
• Drives reported as healthy with no errors in Synology but I'm getting over 9000 errors in unraid
• Have tried new cables and reseating the plugs etc

 

Please see attached SMART reports. The results look pretty bad, and I think it's due to their age. Is there any way to recover these ones? I'm happy to reformat them if needed.

 

Thanks in advance for your help

disk1-tower-smart-20220414-1123.zip disk2-tower-smart-20220414-1123.zip

[JorgeB]

Next time please post the complete diagnostics instead, but both disks are reporting recent UNC@LBA errors, you should run an extended SMART test on both.

[darksupernova]

I apologise @JorgeB, I thought this wouldn't be needed in place of SMART results but please find the diagnostics attached now. I will run an extended SMART test now. 

tower-diagnostics-20220414-1209.zip

[JorgeB]

It's also logged as disk issues, wait for the SMART test to complete, note that these errors can sometimes be intermittent, also good to monitor this attribute for WD drives, if it keeps climbing there will likely be more read errors soon:

 

ID# ATTRIBUTE_NAME          FLAGS    VALUE WORST THRESH FAIL RAW_VALUE
  1 Raw_Read_Error_Rate     POSR-K   200   200   051    -    3519

 

 

 

 

[darksupernova]

Thanks for coming back to me - I'll post the extended SMART results once finished.

[darksupernova]

Evening @JorgeB, I have completed both extended smart reports, please see these attached. To assist with my learning, what are we looking for here? I note that disk 2 shows errors but I'm not sure I understand how to solve. 

 

Interestingly disk 1 says it completed the report without errors but still has 168 errors logged against it in the main array.

 

Any help appreciated.

 

All the best

disk2-tower-smart-20220414-1123.zip disk1-tower-smart-20220414-1123.zip

[trurl]

You should add attributes 1 and 200 for monitoring for all WD disks. Click on the disk to get to its page and put 1,200 in the Custom Attributes.

 

Serial Number:    WD-WMC4N2016073
SMART Extended Self-test Log Version: 1 (1 sectors)
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Extended offline    Completed: read failure       10%     32951         5533193824

All you need to know on that one. Replace.

 

 

[darksupernova]

Hi @trurl, 

Thank you for taking the time to read the reports.

 

I have updates the 'SMART attribute notifications' field to 1200.

 

RE disk 2 - There is no way to repair the disk? I need to bin it and order a new one? Is 3.7 years a good lifetime for a disk?

 

Thanks for your help

[itimpi]

4 minutes ago, darksupernova said:

 

I have updates the 'SMART attribute notifications' field to 1200.

 

 

that does not sound right    There are 2 separate attributes, 1 and 200 to be monitored

 

[darksupernova]

Thank you @itimpi, I realise that I misread the original message. Attributes updated.

[JorgeB]

27 minutes ago, darksupernova said:

RE disk 2 - There is no way to repair the disk?

A full disk write might fix it for now, but likely there would be new read errors soon, the other disk is fine for now but if the mentioned attributes keep climbing will likely also generate more read errors.

[trurl]

Be sure to setup Notifications to alert you immediately by email or other agent as soon as a problem is detected. Don't let one problem you don't know about become multiple problems that are difficult to recover from.

[darksupernova]

Thank you both very much for the advice. I've ordered a new drive and will turn on notifications. 

 

Next to try and work out how to switch a drive out! 

 

All the best, 

[JorgeB]

4 minutes ago, darksupernova said:

Next to try and work out how to switch a drive out! 

 

https://wiki.unraid.net/Manual/Storage_Management#Replacing_disks

[darksupernova]

On 4/16/2022 at 10:05 AM, JorgeB said:

 

https://wiki.unraid.net/Manual/Storage_Management#Replacing_disks

Thank you! Had a good read through this, all seems fairly straightforward. New disk arriving on Saturday so will swap them out then.

 

All the best,