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Unhealthy Pool alert - please advise

Western Digital Drives - The Preferred Drives of FreeNAS and TrueNAS CORE

NJMorf

Member
Joined
Aug 9, 2017
Messages
53
Hi all.

I got this alert from my NAS via email: "Pool volume_1 state is ONLINE: One or more devices has experienced an unrecoverable error. An attempt was made to correct the error. Applications are unaffected".

Looking at my pools, I see this: "volume_1 ONLINE (Unhealthy) | 4.48 TiB (85%) Used | 804.2 GiB Free"

(Note that I'm aware that the pool is low on space and intend to expand it once I've rehoused my server in a case with more drive bays.)

Pool status shows the following:

Code:
Name     Read     Write     Checksum     Status   
volume_1    0    0    0    ONLINE
MIRROR    0    0    0    ONLINE 
ada0p2    0    0    0    ONLINE 
ada1p2    0    0    0    ONLINE 
MIRROR    0    0    0    ONLINE 
da1p2    0    0    0    ONLINE 
da0p2    7    0    0    ONLINE


I'm assuming that da0 is suspect, given that it's the only one showing a non-zero value. I've checked the individual drives' SMART test results in Storage / Disks and none of them show any errors, including da0.

I've checked the short SMART results using smartctl -a for each drive (note that ada0 and ada1 are IronWolfs, hence the large number of read and seek errors):

Code:
root@freenas:/ # smartctl -a /dev/ada0
smartctl 7.2 2020-12-30 r5155 [FreeBSD 12.2-RELEASE-p9 amd64] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Seagate IronWolf
Device Model:     ST3000VN007-2E4166
Serial Number:    Z730VG76
LU WWN Device Id: 5 000c50 0b1e623db
Firmware Version: SC60
User Capacity:    3,000,592,982,016 bytes [3.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5900 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-2, ACS-3 T13/2161-D revision 3b
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Mon Aug 23 19:01:10 2021 BST
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:      ( 249) Self-test routine in progress...
                                        90% of test remaining.
Total time to complete Offline
data collection:                (  107) seconds.
Offline data collection
capabilities:                    (0x7b) SMART execute Offline immediate.
                                        Auto Offline data collection on/off support.
                                        Suspend Offline collection upon new
                                        command.
                                        Offline surface scan supported.
                                        Self-test supported.
                                        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:        (   1) minutes.
Extended self-test routine
recommended polling time:        ( 375) minutes.
Conveyance self-test routine
recommended polling time:        (   2) minutes.
SCT capabilities:              (0x10bd) SCT Status supported.
                                        SCT Error Recovery Control supported.
                                        SCT Feature Control supported.
                                        SCT Data Table supported.

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   108   099   006    Pre-fail  Always       -       17753232
  3 Spin_Up_Time            0x0003   093   093   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   082   060   030    Pre-fail  Always       -       174467637
  9 Power_On_Hours          0x0032   070   070   000    Old_age   Always       -       26411
10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0
12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       50
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
189 High_Fly_Writes         0x003a   040   040   000    Old_age   Always       -       60
190 Airflow_Temperature_Cel 0x0022   058   054   045    Old_age   Always       -       42 (Min/Max 37/45)
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       -       24
193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       116
194 Temperature_Celsius     0x0022   042   046   000    Old_age   Always       -       42 (0 22 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

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    Self-test routine in progress 90%     26411         -
# 2  Short offline       Completed without error       00%     26392         -
# 3  Short offline       Completed without error       00%     26224         -
# 4  Short offline       Completed without error       00%     26056         -
# 5  Short offline       Completed without error       00%     25888         -
# 6  Short offline       Completed without error       00%     25720         -
# 7  Short offline       Completed without error       00%     25552         -
# 8  Short offline       Completed without error       00%     25384         -
# 9  Short offline       Completed without error       00%     25216         -
#10  Short offline       Completed without error       00%     25048         -
#11  Short offline       Completed without error       00%     24880         -
#12  Short offline       Completed without error       00%     24712         -
#13  Short offline       Completed without error       00%     24544         -
#14  Short offline       Completed without error       00%     24376         -
#15  Short offline       Completed without error       00%     24208         -
#16  Short offline       Completed without error       00%     24040         -
#17  Short offline       Completed without error       00%     23872         -
#18  Short offline       Completed without error       00%     23704         -
#19  Short offline       Completed without error       00%     23536         -
#20  Short offline       Completed without error       00%     23368         -
#21  Short offline       Completed without error       00%     23200         -

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:
root@freenas:/ # smartctl -a /dev/ada1
smartctl 7.2 2020-12-30 r5155 [FreeBSD 12.2-RELEASE-p9 amd64] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Seagate IronWolf
Device Model:     ST3000VN007-2E4166
Serial Number:    Z730QGEF
LU WWN Device Id: 5 000c50 0b1e44858
Firmware Version: SC60
User Capacity:    3,000,592,982,016 bytes [3.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5900 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-2, ACS-3 T13/2161-D revision 3b
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Mon Aug 23 19:01:14 2021 BST
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:                (   97) seconds.
Offline data collection
capabilities:                    (0x7b) SMART execute Offline immediate.
                                        Auto Offline data collection on/off support.
                                        Suspend Offline collection upon new
                                        command.
                                        Offline surface scan supported.
                                        Self-test supported.
                                        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:        (   1) minutes.
Extended self-test routine
recommended polling time:        ( 382) minutes.
Conveyance self-test routine
recommended polling time:        (   2) minutes.
SCT capabilities:              (0x10bd) SCT Status supported.
                                        SCT Error Recovery Control supported.
                                        SCT Feature Control supported.
                                        SCT Data Table supported.

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       -       187862440
  3 Spin_Up_Time            0x0003   093   093   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   081   060   030    Pre-fail  Always       -       166261646
  9 Power_On_Hours          0x0032   070   070   000    Old_age   Always       -       26411
10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0
12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       50
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
189 High_Fly_Writes         0x003a   058   058   000    Old_age   Always       -       42
190 Airflow_Temperature_Cel 0x0022   062   056   045    Old_age   Always       -       38 (Min/Max 36/44)
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       -       24
193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       117
194 Temperature_Celsius     0x0022   038   044   000    Old_age   Always       -       38 (0 22 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

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%     26391         -
# 2  Short offline       Completed without error       00%     26223         -
# 3  Short offline       Completed without error       00%     26055         -
# 4  Short offline       Completed without error       00%     25887         -
# 5  Short offline       Completed without error       00%     25719         -
# 6  Short offline       Completed without error       00%     25551         -
# 7  Short offline       Completed without error       00%     25384         -
# 8  Short offline       Completed without error       00%     25215         -
# 9  Short offline       Completed without error       00%     25047         -
#10  Short offline       Completed without error       00%     24879         -
#11  Short offline       Completed without error       00%     24711         -
#12  Short offline       Completed without error       00%     24543         -
#13  Short offline       Completed without error       00%     24376         -
#14  Short offline       Completed without error       00%     24208         -
#15  Short offline       Completed without error       00%     24039         -
#16  Short offline       Completed without error       00%     23871         -
#17  Short offline       Completed without error       00%     23703         -
#18  Short offline       Completed without error       00%     23535         -
#19  Short offline       Completed without error       00%     23367         -
#20  Short offline       Completed without error       00%     23199         -
#21  Short offline       Completed without error       00%     23031         -

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:
root@freenas:/ # smartctl -a /dev/da0
smartctl 7.2 2020-12-30 r5155 [FreeBSD 12.2-RELEASE-p9 amd64] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Red
Device Model:     WDC WD30EFRX-68EUZN0
Serial Number:    WD-WCC4N0HDZP4C
LU WWN Device Id: 5 0014ee 264334f6f
Firmware Version: 82.00A82
User Capacity:    3,000,592,982,016 bytes [3.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5400 rpm
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-2 (minor revision not indicated)
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Mon Aug 23 19:01:19 2021 BST
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:  (0x00) Offline data collection activity
                                        was never started.
                                        Auto Offline Data Collection: Disabled.
Self-test execution status:      ( 249) Self-test routine in progress...
                                        90% of test remaining.
Total time to complete Offline
data collection:                (37920) seconds.
Offline data collection
capabilities:                    (0x7b) SMART execute Offline immediate.
                                        Auto Offline data collection on/off support.
                                        Suspend Offline collection upon new
                                        command.
                                        Offline surface scan supported.
                                        Self-test supported.
                                        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:        ( 380) minutes.
Conveyance self-test routine
recommended polling time:        (   5) minutes.
SCT capabilities:              (0x703d) 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     0x002f   200   200   051    Pre-fail  Always       -       57
  3 Spin_Up_Time            0x0027   183   182   021    Pre-fail  Always       -       5841
  4 Start_Stop_Count        0x0032   099   099   000    Old_age   Always       -       1095
  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   053   053   000    Old_age   Always       -       34820
10 Spin_Retry_Count        0x0032   100   100   000    Old_age   Always       -       0
11 Calibration_Retry_Count 0x0032   100   100   000    Old_age   Always       -       0
12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       814
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       35
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       1751
194 Temperature_Celsius     0x0022   114   109   000    Old_age   Always       -       36
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   100   253   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x0008   100   253   000    Old_age   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%      8408         -
# 2  Short offline       Completed without error       00%      7666         -
# 3  Short offline       Completed without error       00%      6947         -
# 4  Short offline       Completed without error       00%      6204         -
# 5  Short offline       Completed without error       00%      5485         -
# 6  Short offline       Completed without error       00%      4743         -
# 7  Short offline       Completed without error       00%      4075         -
# 8  Short offline       Completed without error       00%      3339         -
# 9  Short offline       Completed without error       00%      2597         -
#10  Short offline       Completed without error       00%      1935         -
#11  Short offline       Completed without error       00%      1298         -
#12  Short offline       Completed without error       00%       672         -

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:
root@freenas:/ # smartctl -a /dev/da1
smartctl 7.2 2020-12-30 r5155 [FreeBSD 12.2-RELEASE-p9 amd64] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Red
Device Model:     WDC WD30EFRX-68EUZN0
Serial Number:    WD-WCC4N4CJTLD7
LU WWN Device Id: 5 0014ee 20edde9de
Firmware Version: 82.00A82
User Capacity:    3,000,592,982,016 bytes [3.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5400 rpm
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-2 (minor revision not indicated)
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Mon Aug 23 19:01:20 2021 BST
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:  (0x00) Offline data collection activity
                                        was never started.
                                        Auto Offline Data Collection: Disabled.
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:                (41460) seconds.
Offline data collection
capabilities:                    (0x7b) SMART execute Offline immediate.
                                        Auto Offline data collection on/off support.
                                        Suspend Offline collection upon new
                                        command.
                                        Offline surface scan supported.
                                        Self-test supported.
                                        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:        ( 416) minutes.
Conveyance self-test routine
recommended polling time:        (   5) minutes.
SCT capabilities:              (0x703d) 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     0x002f   200   200   051    Pre-fail  Always       -       0
  3 Spin_Up_Time            0x0027   182   181   021    Pre-fail  Always       -       5866
  4 Start_Stop_Count        0x0032   099   099   000    Old_age   Always       -       1095
  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   053   053   000    Old_age   Always       -       34821
10 Spin_Retry_Count        0x0032   100   100   000    Old_age   Always       -       0
11 Calibration_Retry_Count 0x0032   100   100   000    Old_age   Always       -       0
12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       814
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       35
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       1674
194 Temperature_Celsius     0x0022   115   109   000    Old_age   Always       -       35
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   100   253   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x0008   100   253   000    Old_age   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%      8410         -
# 2  Short offline       Completed without error       00%      7667         -
# 3  Short offline       Completed without error       00%      6948         -
# 4  Short offline       Completed without error       00%      6205         -
# 5  Short offline       Completed without error       00%      5487         -
# 6  Short offline       Completed without error       00%      4744         -
# 7  Short offline       Completed without error       00%      4076         -
# 8  Short offline       Completed without error       00%      3341         -
# 9  Short offline       Completed without error       00%      2598         -
#10  Short offline       Completed without error       00%      1936         -
#11  Short offline       Completed without error       00%      1299         -
#12  Short offline       Completed without error       00%       673         -

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.

root@freenas:/ #


I'm running a long test on da0 and one other drive (I'm hoping the other drive is OK and will provide reasonable reference data) which are going to take a few hours to complete. I'm looking at this post to try and interpret the data.

Based on the above, is it reasonable to assume that da0 has caused the pool to be flagged as unhealthy because of its read errors? Is this error rate significant enough to require replacing the drive, or could I live with it for a while longer?

Thanks in advance.
 
Last edited:

NugentS

Neophyte Sage
Joined
Apr 16, 2020
Messages
673
see what the extended smart test comes up with. I would however make sure you have available a spare drive - just on principle
 

sretalla

Wizened Sage
Joined
Jan 1, 2016
Messages
5,231
1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail Always - 57
You can already see that da0 internally agrees with the assessment from ZFS that there are read errors on that drive.

That's a sign that failure of the drive is on the way, so prepare to replace it.

I guess your long test will just further confirm it.
 

danb35

Wizened Sage
Joined
Aug 16, 2011
Messages
12,363
You can already see that da0 internally agrees with the assessment from ZFS that there are read errors on that drive.
...and it hasn't had a SMART self-test run in 26,000 hours.

Edit: ada0 and ada1 (but particularly ada0) are also running pretty warm. That isn't causing the pool errors, but will tend to degrade them.
 

NJMorf

Member
Joined
Aug 9, 2017
Messages
53
Thought I'd posted this last night, but it appears not. Results from the long test on da0:
Code:
root@freenas:/ # smartctl -a /dev/da0
smartctl 7.2 2020-12-30 r5155 [FreeBSD 12.2-RELEASE-p9 amd64] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Red
Device Model:     WDC WD30EFRX-68EUZN0
Serial Number:    WD-WCC4N0HDZP4C
LU WWN Device Id: 5 0014ee 264334f6f
Firmware Version: 82.00A82
User Capacity:    3,000,592,982,016 bytes [3.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5400 rpm
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-2 (minor revision not indicated)
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Tue Aug 24 16:06:13 2021 BST
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:  (0x00) Offline data collection activity
                                        was never started.
                                        Auto Offline Data Collection: Disabled.
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:                (37920) seconds.
Offline data collection
capabilities:                    (0x7b) SMART execute Offline immediate.
                                        Auto Offline data collection on/off support.
                                        Suspend Offline collection upon new
                                        command.
                                        Offline surface scan supported.
                                        Self-test supported.
                                        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:        ( 380) minutes.
Conveyance self-test routine
recommended polling time:        (   5) minutes.
SCT capabilities:              (0x703d) 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     0x002f   200   200   051    Pre-fail  Always       -       57
  3 Spin_Up_Time            0x0027   183   182   021    Pre-fail  Always       -       5841
  4 Start_Stop_Count        0x0032   099   099   000    Old_age   Always       -       1095
  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   053   053   000    Old_age   Always       -       34841
10 Spin_Retry_Count        0x0032   100   100   000    Old_age   Always       -       0
11 Calibration_Retry_Count 0x0032   100   100   000    Old_age   Always       -       0
12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       814
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       35
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       1751
194 Temperature_Celsius     0x0022   117   109   000    Old_age   Always       -       33
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   100   253   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      -       142

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    Completed without error       00%     34827         -
# 2  Short offline       Completed without error       00%      8408         -
# 3  Short offline       Completed without error       00%      7666         -
# 4  Short offline       Completed without error       00%      6947         -
# 5  Short offline       Completed without error       00%      6204         -
# 6  Short offline       Completed without error       00%      5485         -
# 7  Short offline       Completed without error       00%      4743         -
# 8  Short offline       Completed without error       00%      4075         -
# 9  Short offline       Completed without error       00%      3339         -
#10  Short offline       Completed without error       00%      2597         -
#11  Short offline       Completed without error       00%      1935         -
#12  Short offline       Completed without error       00%      1298         -
#13  Short offline       Completed without error       00%       672         -

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.


I notice that Raw_Read_Error_Rate is unchanged, as are most of the attributes list, but Multi_Zone_Error_Rate has gone from zero to 142. The troubleshooting guide I linked before says:
MultiZone Error Rate can be the cause of a drive failure although a value in this location doesn't always mean it's the fault. It is notable if there are no other failing indications.
It also says:
Much of the other data is manufacturer specific so even if they look like they could be accurate data, odds are they are not important since there are other well known values that do maintain meaning. Let me provide you a great example of what I'm talking about, ID 1 - Raw Read Error Rate. This value represents errors in reading data, right? Yes is the answer however how the manufacturer does this is different between manufacturers and it's all due to design.

That's just confusing me further: not only does TrueNAS report 7 read errors when the drive reports 57, but Raw_Read_Error_Rate and Multi_Zone_Error_Rate are each either the cause of the error or possibly irrelevant. Is there any way to identify exactly what TrueNAS is considering to be the problem?

So far it seems to me that I might as well buy a couple of larger drives and replace the two in the affected pool, hopefully solving the "unhealthy" issue and the free space issue at the same time. Are there any other suggestions?

As for not running a SMART test in 26000 hours: I guess I assumed that TrueNAS was handling testing itself, so I never thought I needed to set up tasks myself. Also regarding the temperatures: my server's a stock Dell PowerEdge T30, so that's probably as good as they're going to get. They're well within operating range according to manufacturer's specs.
 
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