Confusing error on TRUENAS

Yesterday morning i received an alert from my TRUENAS server “* Pool VDEV state is ONLINE: One or more devices has experienced an unrecoverable error. An attempt was made to correct the error. Applications are unaffected”

So went to check on the system the pool status was showing online and big cross next to it. Checked the disks and one disk was showing 2 error under checksum for one disk. However on checking the smart tests, it was showing completed without error. But when i checked the smart parameters i found 2 concerning lines
5 Reallocated_Sector_Ct
191 G-Sense_Error_Rate

See full output below

ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x000b   100   100   050    Pre-fail  Always       -       0
  2 Throughput_Performance  0x0005   100   100   050    Pre-fail  Offline      -       0
  3 Spin_Up_Time            0x0027   100   100   001    Pre-fail  Always       -       10225
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       99
  5 Reallocated_Sector_Ct   0x0033   100   100   050    Pre-fail  Always       -       8
  7 Seek_Error_Rate         0x000b   100   100   050    Pre-fail  Always       -       0
  8 Seek_Time_Performance   0x0005   100   100   050    Pre-fail  Offline      -       0
  9 Power_On_Hours          0x0032   074   074   000    Old_age   Always       -       10795
 10 Spin_Retry_Count        0x0033   101   100   030    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       98
191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       4959
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       7
193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       102
194 Temperature_Celsius     0x0022   100   100   000    Old_age   Always       -       41 (Min/Max 23/52)
196 Reallocated_Event_Count 0x0032   100   100   000    Old_age   Always       -       1
197 Current_Pending_Sector  0x0032   100   100   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0030   100   100   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   200   253   000    Old_age   Always       -       0
220 Disk_Shift              0x0002   100   100   000    Old_age   Always       -       0
222 Loaded_Hours            0x0032   074   074   000    Old_age   Always       -       10794
223 Load_Retry_Count        0x0032   100   100   000    Old_age   Always       -       0
224 Load_Friction           0x0022   100   100   000    Old_age   Always       -       0
226 Load-in_Time            0x0026   100   100   000    Old_age   Always       -       550
240 Head_Flying_Hours       0x0001   100   100   001    Pre-fail  Offline      -       0

I guessed this disk was failing and needs to be replaced and got busy getting the invoice for a RMA.

Later in the day i had power failure in area which triggers a shutdown of TrueNAS. Today after powerup when i checked the server, the alert was gone, there is no trace of that alert or the error anywhere. The Pool status is back to normal Online and Tick next to it.

I checked the disk that was showing the error and the SMART parameters still show the same values but everything else seems fine. The checksum errors are zero.

So what do i gather from this, it was a transient error or does the hard disk needs replacement ?? I cant figure out how the error corrected itself until and unless the reboot cleared out all the errors. But that not right because if the hard disk is going to fail the error should be more permanent.

Now i am not sure if i should send the disk for a RMA, more importantly I am not sure if the vendor will accept the disk for RMA with just these 2 error lines.

Any advice?

Sounds like there was an CRC error that was corrected when the system restarted. The drive vendors vendors sometimes want their tests run on the drive before allowing an RMA. Look for the RAW_VALUE number for Reallocated_Sector_Ct to show some bad sectors to know there is an issues.

I did check and these 2 parameters have values when they should be zero

Reallocated_Sector_Ct has a raw value of 8
G-Sense_Error_Rate has a raw value of 4959

I checked informally with my vendor and he says usually HDD RMA services are outsourced to third parties and they accept RMA only if the HDD fails the tests of their utility. Or SMART reports major errors.

In the case above SMART passes successfully and does not report any error.

I’d still buy a spare and have it ready. But this is not the first time I’ve seen something similar on mine and I think it went another 2 years before giving more problems. I upgraded my entire pool at that time because I needed more storage anyway.

Just to update on this issue. Something weird is happening. I now have 2 disks showing checksum error. The earlier disk that was causing this error is no longer showing this error. These are 2 different disks. But the SMART data on both disk is clean. Further the errors disappear after i reboot machine and then in about 30 minutes the error comes back. I notice the errors come during the scrub process running before the errors come.

I am running TrueNAS-13.0-U2 and just upgraded the Pool to get the benefits of the new ZFS changes. This was done about a week back. The error has been showing up from yesterday.

Any idea how to troubleshoot this error. The screenshot of the error is shown below.

What is the SMART output of this drive?

This is for the first disk - which shows 3 checksum errors

smartctl 7.2 2021-09-14 r5236 [FreeBSD 13.1-RELEASE-p1 amd64] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Toshiba MG04ACA... Enterprise HDD
Device Model:     TOSHIBA MG04ACA600E
Serial Number:    60QXK370FTMB
LU WWN Device Id: 5 000039 a1c701554
Firmware Version: FS4B
User Capacity:    6,001,175,126,016 bytes [6.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Fri Sep 16 15:02:38 2022 IST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status:  (0x82) Offline data collection activity
                                        was completed without error.
                                        Auto Offline Data Collection: Enabled.
Self-test execution status:      (   0) The previous self-test routine completed
                                        without error or no self-test has ever
                                        been run.
Total time to complete Offline
data collection:                (  120) seconds.
Offline data collection
capabilities:                    (0x5b) SMART execute Offline immediate.
                                        Auto Offline data collection on/off support.
                                        Suspend Offline collection upon new
                                        command.
                                        Offline surface scan supported.
                                        Self-test supported.
                                        No Conveyance Self-test supported.
                                        Selective Self-test supported.
SMART capabilities:            (0x0003) Saves SMART data before entering
                                        power-saving mode.
                                        Supports SMART auto save timer.
Error logging capability:        (0x01) Error logging supported.
                                        General Purpose Logging supported.
Short self-test routine
recommended polling time:        (   2) minutes.
Extended self-test routine
recommended polling time:        ( 631) minutes.
SCT capabilities:              (0x003d) SCT Status supported.
                                        SCT Error Recovery Control supported.
                                        SCT Feature Control supported.
                                        SCT Data Table supported.

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     0x000b   100   100   050    Pre-fail  Always       -       0
  2 Throughput_Performance  0x0005   100   100   050    Pre-fail  Offline      -       0
  3 Spin_Up_Time            0x0027   100   100   001    Pre-fail  Always       -       10227
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       107
  5 Reallocated_Sector_Ct   0x0033   100   100   050    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000b   100   100   050    Pre-fail  Always       -       0
  8 Seek_Time_Performance   0x0005   100   100   050    Pre-fail  Offline      -       0
  9 Power_On_Hours          0x0032   072   072   000    Old_age   Always       -       11426
 10 Spin_Retry_Count        0x0033   102   100   030    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       105
191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       33
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       11
193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       110
194 Temperature_Celsius     0x0022   100   100   000    Old_age   Always       -       38 (Min/Max 22/50)
196 Reallocated_Event_Count 0x0032   100   100   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0032   100   100   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0030   100   100   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   200   253   000    Old_age   Always       -       0
220 Disk_Shift              0x0002   100   100   000    Old_age   Always       -       0
222 Loaded_Hours            0x0032   072   072   000    Old_age   Always       -       11425
223 Load_Retry_Count        0x0032   100   100   000    Old_age   Always       -       0
224 Load_Friction           0x0022   100   100   000    Old_age   Always       -       0
226 Load-in_Time            0x0026   100   100   000    Old_age   Always       -       541
240 Head_Flying_Hours       0x0001   100   100   001    Pre-fail  Offline      -       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  Short offline       Completed without error       00%     11398         -
# 2  Short offline       Completed without error       00%     11350         -
# 3  Short offline       Completed without error       00%     11285         -
# 4  Short offline       Completed without error       00%     11237         -
# 5  Short offline       Completed without error       00%     11189         -
# 6  Short offline       Completed without error       00%     11141         -
# 7  Short offline       Completed without error       00%     11117         -
# 8  Short offline       Completed without error       00%     11059         -
# 9  Short offline       Completed without error       00%     10980         -
#10  Extended offline    Completed without error       00%     10979         -
#11  Short offline       Completed without error       00%     10932         -
#12  Short offline       Completed without error       00%     10884         -
#13  Short offline       Completed without error       00%     10860         -
#14  Short offline       Completed without error       00%     10812         -
#15  Short offline       Completed without error       00%     10792         -
#16  Short offline       Completed without error       00%     10744         -
#17  Short offline       Completed without error       00%     10720         -
#18  Short offline       Completed without error       00%     10672         -
#19  Short offline       Completed without error       00%     10659         -
#20  Short offline       Completed without error       00%     10635         -
#21  Short offline       Completed without error       00%     10588         -

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.

This is for the Second Disk which shows 78 checksum errors

smartctl 7.2 2021-09-14 r5236 [FreeBSD 13.1-RELEASE-p1 amd64] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Toshiba MG04ACA... Enterprise HDD
Device Model:     TOSHIBA MG04ACA600E
Serial Number:    60QWKGQ8FTMB
LU WWN Device Id: 5 000039 a1c680f76
Firmware Version: FS4B
User Capacity:    6,001,175,126,016 bytes [6.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Fri Sep 16 15:02:33 2022 IST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status:  (0x82) Offline data collection activity
                                        was completed without error.
                                        Auto Offline Data Collection: Enabled.
Self-test execution status:      (   0) The previous self-test routine completed
                                        without error or no self-test has ever
                                        been run.
Total time to complete Offline
data collection:                (  120) seconds.
Offline data collection
capabilities:                    (0x5b) SMART execute Offline immediate.
                                        Auto Offline data collection on/off support.
                                        Suspend Offline collection upon new
                                        command.
                                        Offline surface scan supported.
                                        Self-test supported.
                                        No Conveyance Self-test supported.
                                        Selective Self-test supported.
SMART capabilities:            (0x0003) Saves SMART data before entering
                                        power-saving mode.
                                        Supports SMART auto save timer.
Error logging capability:        (0x01) Error logging supported.
                                        General Purpose Logging supported.
Short self-test routine
recommended polling time:        (   2) minutes.
Extended self-test routine
recommended polling time:        ( 638) minutes.
SCT capabilities:              (0x003d) SCT Status supported.
                                        SCT Error Recovery Control supported.
                                        SCT Feature Control supported.
                                        SCT Data Table supported.

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     0x000b   100   100   050    Pre-fail  Always       -       0
  2 Throughput_Performance  0x0005   100   100   050    Pre-fail  Offline      -       0
  3 Spin_Up_Time            0x0027   100   100   001    Pre-fail  Always       -       10266
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       105
  5 Reallocated_Sector_Ct   0x0033   100   100   050    Pre-fail  Always       -       8
  7 Seek_Error_Rate         0x000b   100   100   050    Pre-fail  Always       -       0
  8 Seek_Time_Performance   0x0005   100   100   050    Pre-fail  Offline      -       0
  9 Power_On_Hours          0x0032   072   072   000    Old_age   Always       -       11436
 10 Spin_Retry_Count        0x0033   102   100   030    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       103
191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       5478
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       8
193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       108
194 Temperature_Celsius     0x0022   100   100   000    Old_age   Always       -       40 (Min/Max 23/52)
196 Reallocated_Event_Count 0x0032   100   100   000    Old_age   Always       -       1
197 Current_Pending_Sector  0x0032   100   100   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0030   100   100   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   200   253   000    Old_age   Always       -       0
220 Disk_Shift              0x0002   100   100   000    Old_age   Always       -       0
222 Loaded_Hours            0x0032   072   072   000    Old_age   Always       -       11435
223 Load_Retry_Count        0x0032   100   100   000    Old_age   Always       -       0
224 Load_Friction           0x0022   100   100   000    Old_age   Always       -       0
226 Load-in_Time            0x0026   100   100   000    Old_age   Always       -       543
240 Head_Flying_Hours       0x0001   100   100   001    Pre-fail  Offline      -       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  Short offline       Completed without error       00%     11409         -
# 2  Short offline       Completed without error       00%     11361         -
# 3  Short offline       Completed without error       00%     11295         -
# 4  Short offline       Completed without error       00%     11247         -
# 5  Short offline       Completed without error       00%     11199         -
# 6  Short offline       Completed without error       00%     11151         -
# 7  Short offline       Completed without error       00%     11127         -
# 8  Short offline       Completed without error       00%     11069         -
# 9  Short offline       Completed without error       00%     11022         -
#10  Extended offline    Completed without error       00%     11000         -
#11  Short offline       Completed without error       00%     10980         -
#12  Extended offline    Completed without error       00%     10979         -
#13  Short offline       Completed without error       00%     10932         -
#14  Short offline       Completed without error       00%     10884         -
#15  Short offline       Completed without error       00%     10860         -
#16  Short offline       Completed without error       00%     10812         -
#17  Extended offline    Completed without error       00%     10806         -
#18  Extended offline    Aborted by host               50%     10794         -
#19  Short offline       Completed without error       00%     10744         -
#20  Short offline       Completed without error       00%     10720         -
#21  Short offline       Completed without error       00%     10672         -

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.

EDIT Sorry Just noticed that the second disk was the same one that reported and error last time. But i changed the position of the disk in my array. hence the device name got changed. But the first disk is showing no SMART errors

EDIT: Update. I shutdown the server removed, cleaned and reattached all the HDDs and HDD cables and powered up the server. So far the error has not recurred.

1 Like

Might be worth reading this page Understanding SMART Reports - Unraid | Docs

Generally speaking, it looks like your drives should have plenty of life left in them. Might just be an odd firmware glitch, is there a newer firmware that you can apply?

All that said, I haven’t used Fujitsu in a very long time. Since these are Enterprise grade, I’d expect them to live for a good long time.

Cables that are not fully seated in their connectors and / or have to sharp of bends (improper radius-ed) can cause these types of errors. Such errors may be intermittent showing up as the system temperature changes. Start with the basics and work up the ladder of complexity.

Thats what i did i removed all the SATA and power cables and relaid and reconnected them. The error seems to have gone for now. Thanks guys.