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Parity Errors after a couple of months of being fine

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Unraid version: 4.6 free (2 data disks, 1 parity)

System: Supermicro C2SEA with all the other bits and pieces based on the premade systems by limetech.

This showed up on the web interface, after running a monthly parity check last night:

 

Check will start a Parity-Check.

(Last checked on 2/1/2011 8:13:51 AM, finding 11 errors.)

 

 

Syslog relating to the error:

Feb  1 00:00:01 tower kernel: mdcmd (61): check NOCORRECT

Feb  1 00:00:01 tower kernel:

Feb  1 00:00:01 tower kernel: md: recovery thread woken up ...

Feb  1 00:00:01 tower kernel: md: recovery thread checking parity...

Feb  1 00:00:01 tower kernel: md: using 1152k window, over a total of 1953514552 blocks.

Feb  1 00:06:02 tower dhcpcd[7193]: sending DHCP_REQUEST for 192.168.x.xxx to 192.168.x.xxx

Feb  1 00:06:02 tower dhcpcd[7193]: dhcpIPaddrLeaseTime=7200 in DHCP server response.

Feb  1 00:06:02 tower dhcpcd[7193]: dhcpT1value is missing in DHCP server response. Assuming 3600 sec

Feb  1 00:06:02 tower dhcpcd[7193]: dhcpT2value is missing in DHCP server response. Assuming 6300 sec

Feb  1 00:06:02 tower dhcpcd[7193]: DHCP_ACK received from  (192.168.x.xxx)

Feb  1 00:17:06 tower kernel: md: parity incorrect: 165008568

Feb  1 01:06:02 tower dhcpcd[7193]: sending DHCP_REQUEST for 192.168.x.xxx to 192.168.x.xxx

Feb  1 01:06:02 tower dhcpcd[7193]: dhcpIPaddrLeaseTime=7200 in DHCP server response.

Feb  1 01:06:02 tower dhcpcd[7193]: dhcpT1value is missing in DHCP server response. Assuming 3600 sec

Feb  1 01:06:02 tower dhcpcd[7193]: dhcpT2value is missing in DHCP server response. Assuming 6300 sec

Feb  1 01:06:02 tower dhcpcd[7193]: DHCP_ACK received from  (192.168.x.xxx)

Feb  1 01:19:22 tower kernel: md: parity incorrect: 741627136

Feb  1 01:19:22 tower kernel: md: parity incorrect: 741627144

Feb  1 01:19:22 tower kernel: md: parity incorrect: 741627152

Feb  1 01:19:22 tower kernel: md: parity incorrect: 741627216

Feb  1 01:19:22 tower kernel: md: parity incorrect: 741627224

Feb  1 01:19:22 tower kernel: md: parity incorrect: 741627232

Feb  1 01:19:22 tower kernel: md: parity incorrect: 741627568

Feb  1 01:19:22 tower kernel: md: parity incorrect: 741627576

Feb  1 01:19:22 tower kernel: md: parity incorrect: 741627648

Feb  1 01:19:22 tower kernel: md: parity incorrect: 741627656

 

 

(everything above, and everything below that is normal behaviour, DHCP requests from and to the firewall)

 

 

Smart report for disk 0 (parity):

SMART Attributes Data Structure revision number: 16

Vendor Specific SMART Attributes with Thresholds:

ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VAL                                              UE

 1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       -       0

 3 Spin_Up_Time            0x0027   243   241   021    Pre-fail  Always       -       9850

 4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       38

 5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0

 7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0

 9 Power_On_Hours          0x0032   098   098   000    Old_age   Always       -       1807

10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0

11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0

12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       15

192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       5

193 Load_Cycle_Count        0x0032   185   185   000    Old_age   Always       -       46152

194 Temperature_Celsius     0x0022   129   119   000    Old_age   Always       -       23

196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0

197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0

198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      -       0

199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0

200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       0

 

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):

 

 

 

 

Smart report for disk 1 (data disk 1):

 

SMART Attributes Data Structure revision number: 16

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   100   100   051    Pre-fail  Always       -       0

 3 Spin_Up_Time            0x0007   074   074   011    Pre-fail  Always       -       8600

 4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       233

 5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail  Always       -       0

 7 Seek_Error_Rate         0x000f   253   253   051    Pre-fail  Always       -       0

 8 Seek_Time_Performance   0x0025   100   100   015    Pre-fail  Offline      -       0

 9 Power_On_Hours          0x0032   099   099   000    Old_age   Always       -       2572

10 Spin_Retry_Count        0x0033   100   100   051    Pre-fail  Always       -       0

11 Calibration_Retry_Count 0x0012   100   100   000    Old_age   Always       -       0

12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       129

13 Read_Soft_Error_Rate    0x000e   100   100   000    Old_age   Always       -       0

183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0

184 End-to-End_Error        0x0033   100   100   000    Pre-fail  Always       -       0

187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0

188 Command_Timeout         0x0032   100   100   000    Old_age   Always       -       0

190 Airflow_Temperature_Cel 0x0022   085   057   000    Old_age   Always       -       15 (Lifetime Min/Max 14/19)

194 Temperature_Celsius     0x0022   085   056   000    Old_age   Always       -       15 (Lifetime Min/Max 12/20)

195 Hardware_ECC_Recovered  0x001a   100   100   000    Old_age   Always       -       530880464

196 Reallocated_Event_Count 0x0032   100   100   000    Old_age   Always       -       0

197 Current_Pending_Sector  0x0012   100   100   000    Old_age   Always       -       0

198 Offline_Uncorrectable   0x0030   100   100   000    Old_age   Offline      -       0

199 UDMA_CRC_Error_Count    0x003e   100   100   000    Old_age   Always       -       0

200 Multi_Zone_Error_Rate   0x000a   100   100   000    Old_age   Always       -       0

201 Soft_Read_Error_Rate    0x000a   100   100   000    Old_age   Always       -       0

 

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):

 

 

 

Smart report for disk 2 (data disk 2)

 

 

SMART Attributes Data Structure revision number: 16

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   100   100   051    Pre-fail  Always       -       0

 3 Spin_Up_Time            0x0007   074   074   011    Pre-fail  Always       -       8710

 4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       153

 5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail  Always       -       0

 7 Seek_Error_Rate         0x000f   253   253   051    Pre-fail  Always       -       0

 8 Seek_Time_Performance   0x0025   100   100   015    Pre-fail  Offline      -       10733

 9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       2524

10 Spin_Retry_Count        0x0033   100   100   051    Pre-fail  Always       -       0

11 Calibration_Retry_Count 0x0012   100   100   000    Old_age   Always       -       0

12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       129

13 Read_Soft_Error_Rate    0x000e   100   100   000    Old_age   Always       -       0

183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0

184 End-to-End_Error        0x0033   100   100   000    Pre-fail  Always       -       0

187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0

188 Command_Timeout         0x0032   100   100   000    Old_age   Always       -       0

190 Airflow_Temperature_Cel 0x0022   086   057   000    Old_age   Always       -       14 (Lifetime Min/Max 13/18)

194 Temperature_Celsius     0x0022   084   056   000    Old_age   Always       -       16 (Lifetime Min/Max 11/20)

195 Hardware_ECC_Recovered  0x001a   100   100   000    Old_age   Always       -       618204199

196 Reallocated_Event_Count 0x0032   100   100   000    Old_age   Always       -       0

197 Current_Pending_Sector  0x0012   100   100   000    Old_age   Always       -       0

198 Offline_Uncorrectable   0x0030   100   100   000    Old_age   Offline      -       0

199 UDMA_CRC_Error_Count    0x003e   100   100   000    Old_age   Always       -       0

200 Multi_Zone_Error_Rate   0x000a   100   099   000    Old_age   Always       -       1

201 Soft_Read_Error_Rate    0x000a   100   100   000    Old_age   Always       -       0

 

SMART Error Log Version: 1

No Errors Logged

 

SMART Self-test log structure revision number 1

Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error

# 1  Extended offline    Aborted by host               30%       811         -

# 2  Short offline       Completed without error       00%       808         -

# 3  Extended offline    Completed without error       00%       783         -

# 4  Extended offline    Aborted by host               60%       763         -

# 5  Extended offline    Completed without error       00%       747         -

# 6  Conveyance offline  Completed without error       00%       742         -

# 7  Extended offline    Aborted by host               50%       741         -

# 8  Short offline       Completed without error       00%       740         -

# 9  Short offline       Completed without error       00%       725         -

 

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):

 

Have not done anything else, did NOT run reiser check on any of the disks.

 

Should I be worried?

Thank you in advance. If you need more information about something let me know.

 

Edit: Forgot to add that all disks show as green on webpage

 

Edit 2: attaching syslog to this post in case someone misses it from my post below

syslog.zip

Did you have an unclean shutdown (e.g., power failure) recently?

 

You need to post a full syslog for the Linux experts to help. The snippet from the parity check is not enough.

 

I don't see anything unusual in the smart reports.

  • Author

syslog cannot be attached because it's too big. attached last entries around the time of the errors.

 

Power outage was about a month ago, but I've since ran a parity check with no errors.

I see a good few members using pastebin.com for hosting their syslogs - might be of use?

syslog cannot be attached because it's too big. attached last entries around the time of the errors.

 

Power outage was about a month ago, but I've since ran a parity check with no errors.

You could Zip the log up that should make it smaller.  Might then all be uploadable.

If syslog is big likely something is going on that makes it especially important the you post it.

  • Author

Attached syslog. Sorry for the inconvinience caused, my mistake  :-[

syslog.zip

  • Author

Since I or someone else cannot find anything wrong with the smart reports, and there is nothing in the syslog showing further details about this, I'm assuming that the array is in a usable state, and the parity errors were bits left behind during the outage last month/deletion of the boinc1 directories.

 

If this continues the most likely cause is silent data corruption on the data disks I believe (samsung HD103SI both of them, parity drive is a WD20EADS).

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