Unrecoverable error

lyle · May 23, 2014

Hi, there.

I am getting this Warning:

WARNING: The volume Main_server (ZFS) status is UNKNOWN: One or more devices has experienced an unrecoverable error. An attempt was made to correct the error. Applications are unaffected.Determine if the device needs to be replaced, and clear the errors using 'zpool clear' or replace the device with 'zpool replace'.

The Volume is showing "HEALTHY", but in the Volume Status I see that one of the two drives is showing a Checksum value of "1".

Rebooting clears the warning and resets the Checksum to zero for about a week after which this situation reappears. The two drives are set up in mirror and all the files and applications on this volume have been unaffected so far.

What do you think is going on and what further troubleshooting should I do? Both drives are new, bought only six months ago.

thank you for your suggestions!

-Lyle

Yatti420 · May 24, 2014

You have a failing drive or cable or controller.. smartctl -a /dev/ada0 & smartctl -a /dev/ada1 .. Please provide hardware specs.. Also run smart tests..

cyberjock · May 25, 2014

Did you even try searching for that error in the forums? :(

joeschmuck · May 25, 2014

Also post your hardware setup if you want some good help. Knowing what we are dealing with allows us to not waste time isolating your problem. Damn, it's that still part of the forum rules to post?

lyle · May 25, 2014

I got this error when I tried to run "smartctl -a /dev/ada0" and same with "ada1"

"/dev/xpt0 control device couldn't opened: Permission denied
Unable to get CAM device list
/dev/ada0: Unable to detect device type
Please specify device type with the -d option."

Hardware is:
Intel G2030 Dual-Core processor, 3GHz
Gigabyte GA-H61M-DS2H motherboard
8GB 1333Mhz DDR3 RAM
2x Seagate 2TB Barracuda Green hard drives
FreeNAS 9.2.1.5
thank you!

danb35 · May 25, 2014

Were you root when you ran the smartctl command? You need to be.

lyle · May 25, 2014

Aha, that was it. Here is the results from ada0:

Code:

 === START OF INFORMATION SECTION ===                                                                                                
Model Family:     Seagate Barracuda LP                                                                                              
Device Model:     ST31000520AS                                                                                                      
Serial Number:    9VX0WSYZ                                                                                                          
LU WWN Device Id: 5 000c50 026ca5d39                                                                                                
Firmware Version: CC32                                                                                                              
User Capacity:    1,000,204,886,016 bytes [1.00 TB]                                                                                 
Sector Size:      512 bytes logical/physical                                                                                        
Rotation Rate:    5900 rpm                                                                                                          
Device is:        In smartctl database [for details use: -P show]                                                                   
ATA Version is:   ATA8-ACS T13/1699-D revision 4                                                                                    
SATA Version is:  SATA 2.6, 3.0 Gb/s                                                                                                
Local Time is:    Sun May 25 12:01:38 2014 EDT                                                                                      
                                                                                                                                    
==> WARNING: A firmware update for this drive may be available,                                                                     
see the following Seagate web pages:                                                                                                
http://knowledge.seagate.com/articles/en_US/FAQ/207931en                                                                            
http://knowledge.seagate.com/articles/en_US/FAQ/213915en                                                                            
                                                                                                                                    
SMART support is: Available - device has SMART capability.                                                                          
SMART support is: Enabled 
 
Error 4085 occurred at disk power-on lifetime: 24521 hours (1021 days + 17 hours)                                                   
  When the command that caused the error occurred, the device was active or idle.                                                   
                                                                                                                                    
  After command completion occurred, registers were:                                                                                
  ER ST SC SN CL CH DH                                                                                                              
  -- -- -- -- -- -- --                                                                                                              
  40 51 00 ff ff ff 0f  Error: UNC at LBA = 0x0fffffff = 268435455                                                                  
                                                                                                                                    
  Commands leading to the command that caused the error were:                                                                       
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name                                                                   
  -- -- -- -- -- -- -- --  ----------------  --------------------                                                                   
  25 00 10 ff ff ff 4f 00      02:22:44.227  READ DMA EXT                                                                           
  25 00 10 ff ff ff 4f 00      02:22:40.567  READ DMA EXT                                                                           
  25 00 10 ff ff ff 4f 00      02:22:40.561  READ DMA EXT                                                                           
  c8 00 10 90 02 40 e0 00      02:22:40.560  READ DMA                                                                               
  c8 00 00 80 01 40 e0 00      02:22:40.560  READ DMA                                                                               
                                                                                                                                    
Error 4084 occurred at disk power-on lifetime: 24521 hours (1021 days + 17 hours)                                                   
  When the command that caused the error occurred, the device was active or idle.                                                   
                                                                                                                                    
  After command completion occurred, registers were:                                                                                
  ER ST SC SN CL CH DH                                                                                                              
  -- -- -- -- -- -- --                                                                                                              
  40 51 00 ff ff ff 0f  Error: UNC at LBA = 0x0fffffff = 268435455                                                                  
                                                                                                                                    
  Commands leading to the command that caused the error were:                                                                       
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name                                                                   
  -- -- -- -- -- -- -- --  ----------------  --------------------                                                                   
  25 00 10 ff ff ff 4f 00      02:22:40.567  READ DMA EXT                                                                           
  25 00 10 ff ff ff 4f 00      02:22:40.561  READ DMA EXT                                                                           
  c8 00 10 90 02 40 e0 00      02:22:40.560  READ DMA                                                                               
  c8 00 00 80 01 40 e0 00      02:22:40.560  READ DMA                                                                               
  c8 00 00 80 00 40 e0 00      02:22:40.559  READ DMA                                                                               
                                                                                                                                    
SMART Self-test log structure revision number 1                                                                                     
No self-tests have been logged.  [To run self-tests, use: smartctl -t]                                                              
                                                  
SMART Selective self-test log data structure revision number 1                                                                      
 SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS                                                                                        
    1        0        0  Not_testing                                                                                                
    2        0        0  Not_testing                                                                                                
    3        0        0  Not_testing                                                                                                
    4        0        0  Not_testing                                                                                                
    5        0        0  Not_testing                                                                                                
Selective self-test flags (0x0):                                                                                                    
  After scanning selected spans, do NOT read-scan remainder of disk.                                                                
If Selective self-test is pending on power-up, resume after 0 minute delay.                           
/code

lyle · May 25, 2014

And of ada1

Code:

SMART Attributes Data Structure revision number: 10                                                                                 
Vendor Specific SMART Attributes with Thresholds:                                                                                   
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE                                    
  1 Raw_Read_Error_Rate     0x000f   111   100   006    Pre-fail  Always       -       34262680                                     
  3 Spin_Up_Time            0x0003   097   097   000    Pre-fail  Always       -       0                                            
  4 Start_Stop_Count        0x0032   100   100   020    Old_age   Always       -       30                                           
  5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail  Always       -       0                                            
  7 Seek_Error_Rate         0x000f   100   253   030    Pre-fail  Always       -       227887                                       
  9 Power_On_Hours          0x0032   093   093   000    Old_age   Always       -       6669                                         
 10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0                                            
 12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       30                                           
183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0                                            
184 End-to-End_Error        0x0032   100   100   099    Old_age   Always       -       0                                            
187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0                                            
188 Command_Timeout         0x0032   100   100   000    Old_age   Always       -       0 0 0                                        
189 High_Fly_Writes         0x003a   100   100   000    Old_age   Always       -       0                                            
190 Airflow_Temperature_Cel 0x0022   061   047   045    Old_age   Always       -       39 (Min/Max 33/44)                           
191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       0                                            
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       18                                           
193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       170                                          
194 Temperature_Celsius     0x0022   039   053   000    Old_age   Always       -       39 (0 16 0 0 0)                              
197 Current_Pending_Sector  0x0012   100   100   000    Old_age   Always       -       0                                            
198 Offline_Uncorrectable   0x0010   100   100   000    Old_age   Offline      -       0                                            
199 UDMA_CRC_Error_Count    0x003e   200   200   000    Old_age   Always       -       0                                            
240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       6670h+03m+13.737s                            
241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       3485476                                      
242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       2020355408                                   
                                                                                                                                    
SMART Error Log Version: 1                                                                                                          
No Errors Logged                                                                                                                    
                                                                                                                                    
SMART Self-test log structure revision number 1                                                                                     
No self-tests have been logged.  [To run self-tests, use: smartctl -t]                                                              
                                                                                                                                    
                                                                                                                                    
SMART Selective self-test log data structure revision number 1                                                                      
 SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS                                                                                        
    1        0        0  Not_testing                                                                                                
    2        0        0  Not_testing                                                                                                
    3        0        0  Not_testing                                                                                                
    4        0        0  Not_testing                                                                                                
    5        0        0  Not_testing                                                                                                
Selective self-test flags (0x0):                                                                                                    
  After scanning selected spans, do NOT read-scan remainder of disk.                                                                
If Selective self-test is pending on power-up, resume after 0 minute delay.
/code

lyle · May 28, 2014

Was this helpful? Any insights?

thanks, Lyle

danb35 · May 28, 2014

Well, ada0 has experienced over 4000 errors while operating. Does that suggest anything to you?

lyle · May 28, 2014

Safe to say I wouldn't be asking if it did.

Anyone willing to help?

joeschmuck · May 28, 2014

danb35 said:
Well, ada0 has experienced over 4000 errors while operating. Does that suggest anything to you?

I'm curious how you came to that conclusion. This is for my own education. Is Error 4084 and 4085 incremental number of errors or just error codes? I'm assuming it's the number of errors based on your response.

Ericloewe · May 28, 2014

joeschmuck said:
I'm curious how you came to that conclusion. This is for my own education. Is Error 4084 and 4085 incremental number of errors or just error codes? I'm assuming it's the number of errors based on your response.

I always assumed those were the sequential error numbers, given that they're always sequentially numbered.

lyle said:
Safe to say I wouldn't be asking if it did.

Anyone willing to help?

The 4000+ errors sound bad, and I'd risk saying the drive is a goner even without the raw S.MA.R.T. data. Not that it would do much good, since Seagate uses an idiotic inverse log scale that represents the frequency of errors (IIRC, which would mean a raw value of "1" means "every attempt fails" and "insanely large number" means "no errors"). I guess at least it'd read "FAILING_NOW" or similar.

cyberjock · May 28, 2014

Ericloewe said:
The 4000+ errors sound bad, and I'd risk saying the drive is a goner even without the raw S.MA.R.T. data. Not that it would do much good, since Seagate uses an idiotic inverse log scale that represents the frequency of errors (IIRC, which would mean a raw value of "1" means "every attempt fails" and "insanely large number" means "no errors"). I guess at least it'd read "FAILING_NOW" or similar.

Yeah, that disk is probably toast. You should replace it.

As for the inverse log, it's actually the most reasonable way to handle error rates. Rates are almost always in a logarithmic scale because it works. To be honest, I wish the other companies would jump onboard. As an engineer of sorts myself I prefer rates than hard numbers like "0", "1", "2".

danb35 · May 28, 2014

I'm assuming that the error numbers are incremental as well, though I don't have any authority to support that.

Ericloewe · May 29, 2014

cyberjock said:
Yeah, that disk is probably toast. You should replace it.

As for the inverse log, it's actually the most reasonable way to handle error rates. Rates are almost always in a logarithmic scale because it works. To be honest, I wish the other companies would jump onboard. As an engineer of sorts myself I prefer rates than hard numbers like "0", "1", "2".

I understand your point and would agree if we were talking about a system that is kept operating even after a few errors. Since in practice nobody trusts a hard drive that's thrown 10 read errors (I wouldn't trust more than 3-5 errors seperated by large periods), I find that the log scale just obscures what is going on, requiring a calculator (I guess that checking it in binary or hex would yield an obvious number like FFFF, which would quickly translate to 0 errors, but it'd be just as easy to read if the scale was just an absolute number of errors) to obtain a useful number.

Truth be told, I never did like log scales, though they're kind of growing on me. Maybe it's something of an acquired taste in engineering...

joeschmuck · May 29, 2014

And I could see the errors being incremental here and the drive has quite a few hours on it (almost 3 years of operational hours) so it probably is at the end of it's life.

lyle · May 29, 2014

Sorry, guys. I just realized that my two mirror drives are on ADA2 and ADA3. I have two dormant, unused drives on 0 and 1. It is the two mirror drives that make up "Main_server" and the ones occasionally throwing up the error in my original post. Here are the smartctrl outputs:

ADA2:

Code:

SMART Attributes Data Structure revision number: 10                                                                                 
Vendor Specific SMART Attributes with Thresholds:                                                                                   
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE                                    
  1 Raw_Read_Error_Rate     0x000f   117   099   006    Pre-fail  Always       -       153837136                                    
  3 Spin_Up_Time            0x0003   095   094   000    Pre-fail  Always       -       0                                            
  4 Start_Stop_Count        0x0032   100   100   020    Old_age   Always       -       50                                           
  5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail  Always       -       0                                            
  7 Seek_Error_Rate         0x000f   064   055   030    Pre-fail  Always       -       30088259184                                  
  9 Power_On_Hours          0x0032   093   093   000    Old_age   Always       -       6873                                         
 10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0                                            
 12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       51                                           
183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0                                            
184 End-to-End_Error        0x0032   100   100   099    Old_age   Always       -       0                                            
187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0                                            
188 Command_Timeout         0x0032   100   100   000    Old_age   Always       -       0 0 0                                        
189 High_Fly_Writes         0x003a   100   100   000    Old_age   Always       -       0                                            
190 Airflow_Temperature_Cel 0x0022   058   039   045    Old_age   Always   In_the_past 42 (9 6 47 34 0)                             
191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       0                                            
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       37                                           
193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       168                                          
194 Temperature_Celsius     0x0022   042   061   000    Old_age   Always       -       42 (0 15 0 0 0)                              
197 Current_Pending_Sector  0x0012   100   100   000    Old_age   Always       -       0                                            
198 Offline_Uncorrectable   0x0010   100   100   000    Old_age   Offline      -       0                                            
199 UDMA_CRC_Error_Count    0x003e   200   200   000    Old_age   Always       -       0                                            
240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       6873h+34m+25.307s                            
241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       7468404372                                   
242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       14930165845                                  
                                                                                                                                    
SMART Error Log Version: 1                                                                                                          
No Errors Logged                                                                                                                    
                                                                                                                                    
SMART Self-test log structure revision number 1                                                                                     
No self-tests have been logged.  [To run self-tests, use: smartctl -t]                                                              
                                                                                                                                    
                                                                                                                                    
SMART Selective self-test log data structure revision number 1                                                                      
 SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS                                                                                        
    1        0        0  Not_testing                                                                                                
    2        0        0  Not_testing                                                                                                
    3        0        0  Not_testing                                                                                                
    4        0        0  Not_testing                                                                                                
    5        0        0  Not_testing                                                                                                
Selective self-test flags (0x0):                                                                                                    
  After scanning selected spans, do NOT read-scan remainder of disk.                                                                
If Selective self-test is pending on power-up, resume after 0 minute delay.

lyle · May 29, 2014

ADA3:

Code:

SMART Attributes Data Structure revision number: 10                                                                                 
Vendor Specific SMART Attributes with Thresholds:                                                                                   
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE                                    
  1 Raw_Read_Error_Rate     0x000f   118   099   006    Pre-fail  Always       -       187556480                                    
  3 Spin_Up_Time            0x0003   093   092   000    Pre-fail  Always       -       0                                            
  4 Start_Stop_Count        0x0032   100   100   020    Old_age   Always       -       871                                          
  5 Reallocated_Sector_Ct   0x0033   100   100   036    Pre-fail  Always       -       0                                            
  7 Seek_Error_Rate         0x000f   075   060   030    Pre-fail  Always       -       34583202                                     
  9 Power_On_Hours          0x0032   088   088   000    Old_age   Always       -       11306                                        
 10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0                                            
 12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       139                                          
183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0                                            
184 End-to-End_Error        0x0032   100   100   099    Old_age   Always       -       0                                            
187 Reported_Uncorrect      0x0032   098   098   000    Old_age   Always       -       2                                            
188 Command_Timeout         0x0032   100   100   000    Old_age   Always       -       5                                            
189 High_Fly_Writes         0x003a   100   100   000    Old_age   Always       -       0                                            
190 Airflow_Temperature_Cel 0x0022   060   044   045    Old_age   Always   In_the_past 40 (0 34 42 31 0)                            
191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       0                                            
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       853                                          
193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       881                                          
194 Temperature_Celsius     0x0022   040   056   000    Old_age   Always       -       40 (0 14 0 0 0)                              
195 Hardware_ECC_Recovered  0x001a   022   004   000    Old_age   Always       -       187556480                                    
197 Current_Pending_Sector  0x0012   100   100   000    Old_age   Always       -       0                                            
198 Offline_Uncorrectable   0x0010   100   100   000    Old_age   Offline      -       0                                            
199 UDMA_CRC_Error_Count    0x003e   200   200   000    Old_age   Always       -       0                                            
240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       91255170149413                               
241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       4110384788                                   
242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       2873741834                                   
                                                                                                                                    
SMART Error Log Version: 1                                                                                                          
No Errors Logged                                                                                                                    
                                                                                                                                    
SMART Self-test log structure revision number 1                                                                                     
No self-tests have been logged.  [To run self-tests, use: smartctl -t]                                                              
                                                                                                                                    
                                                                                                                                    
SMART Selective self-test log data structure revision number 1                                                                      
 SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS                                                                                        
    1        0        0  Not_testing                                                                                                
    2        0        0  Not_testing                                                                                                
    3        0        0  Not_testing                                                                                                
    4        0        0  Not_testing                                                                                                
    5        0        0  Not_testing                                                                                                
Selective self-test flags (0x0):                                                                                                    
  After scanning selected spans, do NOT read-scan remainder of disk.                                                                
If Selective self-test is pending on power-up, resume after 0 minute delay.

Ericloewe · May 29, 2014

Both drives are running a bit too hot (42ºC / 40ºC) and ADA3 has parameters 187 and 188 non-zero - I'm not familiar with their exact meanings, so I suggest you investigate them.

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