Hi
i have an issue with a device in the boot pool, but it’s not clear to me what device actually has the issue, since the log is referring to dev sda, not part of the boot pool
the error:
the boot pool:
the drives:
The drive device names can change as boot time. I am guessing the log was from a different time than the GUI screenshots. SDA next boot could be SDB or SDC
Either way, I would do SMART Long tests and look at the results.
1 Like
the naming of the drives has been consistent since last hw change.
the error has occurred multiple times for the boot pool, same device every time.
Do you have SMART Long tests run on your drives and checked the info?
Posting complete details on your hardware, OS version and how everything is connected may give a clue. All we have is two conflicting sets of screenshots.
Best to at least run a smartctl -a /dev/sd(drive letter goes here) whenever you see something like that in the logs & jot down the sn# & glance at the smart attributes. At least you’ll know beyond doubt that it is the same drive & can take action based on the sn# labelled on the drive.
…there have been multiple reports in the past where people have put their pool at risk because they assumed that the SDA/B/C/etc did not change & they pulled the wrong disk to swap. Better safe.
Speaking of which, mind providing the output of the command above? sudo as necessary.
1 Like
Ah… Seagate - mind running the following command instead & providing the output?
smartctl -a /dev/sda -v 1,raw48:54 -v 7,raw48:54 -v 195,raw48:54
This’ll translate the values for fields 1, 7, & 195 into something readable for humans. Not an issue, just a quirk of how Seagate drives present smart attributes.
yes
seagate_drives.txt (36.3 KB)
I posted your results using Preformatted Text mode (</>) or Ctrl+e on the toolbar.
=== START OF INFORMATION SECTION ===
Model Family: Seagate Exos 7E8
Device Model: ST8000NM000A-2KE101
Serial Number: WSD8KCEW
LU WWN Device Id: 5 000c50 0ed9a6c9c
Firmware Version: SN02
User Capacity: 8,001,563,222,016 bytes [8.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 7200 rpm
Form Factor: 3.5 inches
Device is: In smartctl database 7.3/5528
ATA Version is: ACS-4 (minor revision not indicated)
SATA Version is: SATA 3.3, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Mon Jan 26 19:54:02 2026 CET
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
See vendor-specific Attribute list for marginal Attributes.
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: ( 559) 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: ( 711) minutes.
Conveyance self-test routine
recommended polling time: ( 2) minutes.
SCT capabilities: (0x70bd) 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 083 064 044 Pre-fail Always - 0
3 Spin_Up_Time 0x0003 093 089 000 Pre-fail Always - 0
4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 130
5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 0
7 Seek_Error_Rate 0x000f 086 060 045 Pre-fail Always - 0
9 Power_On_Hours 0x0032 076 076 000 Old_age Always - 21144
10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 130
18 Head_Health 0x000b 100 100 050 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 056 037 040 Old_age Always In_the_past 44 (Min/Max 41/45 #11)
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 89
193 Load_Cycle_Count 0x0032 100 100 000 Old_age Always - 1787
194 Temperature_Celsius 0x0022 044 063 000 Old_age Always - 44 (0 21 0 0 0)
195 Hardware_ECC_Recovered 0x001a 009 001 000 Old_age Always - 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 - 20868h+43m+04.281s
241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 28352684869
242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 62772887097
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% 21100 -
# 2 Short offline Completed without error 00% 20932 -
# 3 Short offline Completed without error 00% 20764 -
# 4 Short offline Completed without error 00% 20599 -
# 5 Short offline Completed without error 00% 20431 -
# 6 Short offline Completed without error 00% 20263 -
# 7 Short offline Completed without error 00% 20096 -
# 8 Short offline Completed without error 00% 19929 -
# 9 Short offline Completed without error 00% 19761 -
#10 Short offline Completed without error 00% 19593 -
#11 Short offline Completed without error 00% 19425 -
#12 Short offline Completed without error 00% 19257 -
#13 Short offline Completed without error 00% 19089 -
#14 Short offline Completed without error 00% 18920 -
#15 Short offline Completed without error 00% 18752 -
#16 Short offline Completed without error 00% 18584 -
#17 Short offline Completed without error 00% 18416 -
#18 Short offline Completed without error 00% 18263 -
#19 Short offline Completed without error 00% 18095 -
#20 Short offline Completed without error 00% 17927 -
#21 Short offline Completed without error 00% 17759 -
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.
=== START OF INFORMATION SECTION ===
Model Family: Seagate Exos 7E8
Device Model: ST8000NM000A-2KE101
Serial Number: WSD8JW47
LU WWN Device Id: 5 000c50 0ed9a2b98
Firmware Version: SN02
User Capacity: 8,001,563,222,016 bytes [8.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 7200 rpm
Form Factor: 3.5 inches
Device is: In smartctl database 7.3/5528
ATA Version is: ACS-4 (minor revision not indicated)
SATA Version is: SATA 3.3, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Mon Jan 26 19:54:43 2026 CET
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
See vendor-specific Attribute list for marginal Attributes.
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: ( 559) 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: ( 715) minutes.
Conveyance self-test routine
recommended polling time: ( 2) minutes.
SCT capabilities: (0x70bd) 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 082 064 044 Pre-fail Always - 0
3 Spin_Up_Time 0x0003 093 089 000 Pre-fail Always - 0
4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 130
5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 0
7 Seek_Error_Rate 0x000f 086 060 045 Pre-fail Always - 0
9 Power_On_Hours 0x0032 076 076 000 Old_age Always - 21144
10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 130
18 Head_Health 0x000b 100 100 050 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 - 1
190 Airflow_Temperature_Cel 0x0022 056 035 040 Old_age Always In_the_past 44 (Min/Max 41/45 #11)
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 89
193 Load_Cycle_Count 0x0032 100 100 000 Old_age Always - 1785
194 Temperature_Celsius 0x0022 044 065 000 Old_age Always - 44 (0 21 0 0 0)
195 Hardware_ECC_Recovered 0x001a 008 001 000 Old_age Always - 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 - 20879h+54m+45.227s
241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 28356865914
242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 62743104750
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% 21100 -
# 2 Short offline Completed without error 00% 20932 -
# 3 Short offline Completed without error 00% 20764 -
# 4 Short offline Completed without error 00% 20598 -
# 5 Short offline Completed without error 00% 20430 -
# 6 Short offline Completed without error 00% 20263 -
# 7 Short offline Completed without error 00% 20096 -
# 8 Short offline Completed without error 00% 19928 -
# 9 Short offline Completed without error 00% 19760 -
#10 Short offline Completed without error 00% 19592 -
#11 Short offline Completed without error 00% 19424 -
#12 Short offline Completed without error 00% 19256 -
#13 Short offline Completed without error 00% 19089 -
#14 Short offline Completed without error 00% 18920 -
#15 Short offline Completed without error 00% 18752 -
#16 Short offline Completed without error 00% 18584 -
#17 Short offline Completed without error 00% 18416 -
#18 Short offline Completed without error 00% 18263 -
#19 Short offline Completed without error 00% 18094 -
#20 Short offline Completed without error 00% 17926 -
#21 Short offline Completed without error 00% 17758 -
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.
=== START OF INFORMATION SECTION ===
Model Family: Seagate Exos 7E8
Device Model: ST8000NM000A-2KE101
Serial Number: WSD8LVMA
LU WWN Device Id: 5 000c50 0eda5c33d
Firmware Version: SN02
User Capacity: 8,001,563,222,016 bytes [8.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 7200 rpm
Form Factor: 3.5 inches
Device is: In smartctl database 7.3/5528
ATA Version is: ACS-4 (minor revision not indicated)
SATA Version is: SATA 3.3, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Mon Jan 26 19:55:12 2026 CET
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
See vendor-specific Attribute list for marginal Attributes.
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: ( 559) 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: ( 722) minutes.
Conveyance self-test routine
recommended polling time: ( 2) minutes.
SCT capabilities: (0x70bd) 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 082 064 044 Pre-fail Always - 0
3 Spin_Up_Time 0x0003 093 089 000 Pre-fail Always - 0
4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 130
5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 0
7 Seek_Error_Rate 0x000f 086 060 045 Pre-fail Always - 0
9 Power_On_Hours 0x0032 076 076 000 Old_age Always - 21144
10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 130
18 Head_Health 0x000b 100 100 050 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 057 037 040 Old_age Always In_the_past 43 (Min/Max 40/44 #9)
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 90
193 Load_Cycle_Count 0x0032 100 100 000 Old_age Always - 1786
194 Temperature_Celsius 0x0022 043 063 000 Old_age Always - 43 (0 21 0 0 0)
195 Hardware_ECC_Recovered 0x001a 008 001 000 Old_age Always - 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 - 20870h+29m+33.334s
241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 28342652555
242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 62754210936
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% 21100 -
# 2 Short offline Completed without error 00% 20932 -
# 3 Short offline Completed without error 00% 20764 -
# 4 Short offline Completed without error 00% 20598 -
# 5 Short offline Completed without error 00% 20430 -
# 6 Short offline Completed without error 00% 20262 -
# 7 Short offline Completed without error 00% 20096 -
# 8 Short offline Completed without error 00% 19928 -
# 9 Short offline Completed without error 00% 19760 -
#10 Short offline Completed without error 00% 19592 -
#11 Short offline Completed without error 00% 19424 -
#12 Short offline Completed without error 00% 19256 -
#13 Short offline Completed without error 00% 19088 -
#14 Short offline Completed without error 00% 18919 -
#15 Short offline Completed without error 00% 18751 -
#16 Short offline Completed without error 00% 18583 -
#17 Short offline Completed without error 00% 18416 -
#18 Short offline Completed without error 00% 18262 -
#19 Short offline Completed without error 00% 18094 -
#20 Short offline Completed without error 00% 17926 -
#21 Short offline Completed without error 00% 17758 -
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.
=== START OF INFORMATION SECTION ===
Model Family: Seagate Exos 7E8
Device Model: ST8000NM000A-2KE101
Serial Number: WSD8NTG6
LU WWN Device Id: 5 000c50 0eda55731
Firmware Version: SN02
User Capacity: 8,001,563,222,016 bytes [8.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 7200 rpm
Form Factor: 3.5 inches
Device is: In smartctl database 7.3/5528
ATA Version is: ACS-4 (minor revision not indicated)
SATA Version is: SATA 3.3, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Mon Jan 26 19:55:30 2026 CET
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: ( 559) 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: ( 725) minutes.
Conveyance self-test routine
recommended polling time: ( 2) minutes.
SCT capabilities: (0x70bd) 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 083 064 044 Pre-fail Always - 0
3 Spin_Up_Time 0x0003 093 089 000 Pre-fail Always - 0
4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 130
5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 0
7 Seek_Error_Rate 0x000f 086 060 045 Pre-fail Always - 0
9 Power_On_Hours 0x0032 076 076 000 Old_age Always - 21144
10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 130
18 Head_Health 0x000b 100 100 050 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 058 042 040 Old_age Always - 42 (Min/Max 40/44)
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 89
193 Load_Cycle_Count 0x0032 100 100 000 Old_age Always - 1784
194 Temperature_Celsius 0x0022 042 058 000 Old_age Always - 42 (0 21 0 0 0)
195 Hardware_ECC_Recovered 0x001a 009 002 000 Old_age Always - 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 - 20875h+30m+18.346s
241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 28346551776
242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 62786544323
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% 21100 -
# 2 Short offline Completed without error 00% 20932 -
# 3 Short offline Completed without error 00% 20764 -
# 4 Short offline Completed without error 00% 20598 -
# 5 Short offline Completed without error 00% 20430 -
# 6 Short offline Completed without error 00% 20263 -
# 7 Short offline Completed without error 00% 20096 -
# 8 Short offline Completed without error 00% 19928 -
# 9 Short offline Completed without error 00% 19760 -
#10 Short offline Completed without error 00% 19592 -
#11 Short offline Completed without error 00% 19424 -
#12 Short offline Completed without error 00% 19256 -
#13 Short offline Completed without error 00% 19088 -
#14 Short offline Completed without error 00% 18920 -
#15 Short offline Completed without error 00% 18752 -
#16 Short offline Completed without error 00% 18584 -
#17 Short offline Completed without error 00% 18416 -
#18 Short offline Completed without error 00% 18263 -
#19 Short offline Completed without error 00% 18094 -
#20 Short offline Completed without error 00% 17926 -
#21 Short offline Completed without error 00% 17758 -
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.
=== START OF INFORMATION SECTION ===
Model Family: Seagate Exos 7E8
Device Model: ST8000NM000A-2KE101
Serial Number: WSD8NTGC
LU WWN Device Id: 5 000c50 0eda55679
Firmware Version: SN02
User Capacity: 8,001,563,222,016 bytes [8.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 7200 rpm
Form Factor: 3.5 inches
Device is: In smartctl database 7.3/5528
ATA Version is: ACS-4 (minor revision not indicated)
SATA Version is: SATA 3.3, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Mon Jan 26 19:55:54 2026 CET
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: ( 567) 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: ( 726) minutes.
Conveyance self-test routine
recommended polling time: ( 2) minutes.
SCT capabilities: (0x70bd) 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 082 064 044 Pre-fail Always - 0
3 Spin_Up_Time 0x0003 093 090 000 Pre-fail Always - 0
4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 130
5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 0
7 Seek_Error_Rate 0x000f 086 060 045 Pre-fail Always - 0
9 Power_On_Hours 0x0032 076 076 000 Old_age Always - 21144
10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 130
18 Head_Health 0x000b 100 100 050 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 059 042 040 Old_age Always - 41 (Min/Max 39/43)
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 89
193 Load_Cycle_Count 0x0032 100 100 000 Old_age Always - 1780
194 Temperature_Celsius 0x0022 041 058 000 Old_age Always - 41 (0 21 0 0 0)
195 Hardware_ECC_Recovered 0x001a 008 001 000 Old_age Always - 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 - 20869h+03m+58.864s
241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 28342227936
242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 62759770013
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% 21100 -
# 2 Short offline Completed without error 00% 20932 -
# 3 Short offline Completed without error 00% 20764 -
# 4 Short offline Completed without error 00% 20598 -
# 5 Short offline Completed without error 00% 20430 -
# 6 Short offline Completed without error 00% 20263 -
# 7 Short offline Completed without error 00% 20096 -
# 8 Short offline Completed without error 00% 19928 -
# 9 Short offline Completed without error 00% 19760 -
#10 Short offline Completed without error 00% 19592 -
#11 Short offline Completed without error 00% 19424 -
#12 Short offline Completed without error 00% 19256 -
#13 Short offline Completed without error 00% 19089 -
#14 Short offline Completed without error 00% 18920 -
#15 Short offline Completed without error 00% 18752 -
#16 Short offline Completed without error 00% 18584 -
#17 Short offline Completed without error 00% 18416 -
#18 Short offline Completed without error 00% 18263 -
#19 Short offline Completed without error 00% 18094 -
#20 Short offline Completed without error 00% 17926 -
#21 Short offline Completed without error 00% 17758 -
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 see nothing wrong in any of the attributes, only ‘problem’ is that only short tests have been run, never a long test. In theory something could be wrong & was missed.
However, I’m more curious now on how these drives are connected. Random IO errors that aren’t detected on smart logs are curious to say the last.
Any chance we can also get the smart output for the boot-pool drives? (if not seagate HDDs then you don’t need to run the additional parameters, just a smartctl -a /dev/sd(whatever) would be fine.
But do also let us know some hardware details; motherboard, how drives are connected (direct to motherboard, hba… something less kosher?), is truenas virtualized or running on bare metal, etc.
I could imagine this being as simple as needed to reseat some cables/replace a sata data wire based on the clean smart outputs thus far.
I thought the last two results in the DRIVES file above were the boot devices. Did you want Smart Long for those, Fleshmauler?
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first, it’s been working fine for a long time.
mb: Asrock B550 Phantom Gamin ITX
cpu: AMD Ryzen 7 PRO 4750G
mem 32gb ECC - 3200mhz
boot-pool, 2x msata drives connected to the onboard sata controller
bigpool, 5x 8tb sg drives connected via m.2 sata adapter.
not ideal, i used a hba before, but i needed the single pci slot for a gpu.
but stil this setups has been running fine for months.
as a understand it, the mirror boot pool in truenas, it’s just a mirror, in case of a failure of the “active” boot drive, you still have to reboot to the “good” device right?
Oh - you’re right, I was only looking at the second file, but the boot drives are indeed in the original!
Ehh - possibly sketch. A lot the recommendations are for what’ll work least poorly when something goes wrong instead of what’ll simply be functional. I’m not blaming the hardware or setup, but it could be a factor & it is reasonable to review.
System would still run fine as long as 1 of the mirrored drives is working; both are active.
As far as rebooting with a failed mirror - depends on the kind of failure. For example; lets say sda & sba are mirrored boot drives. The bios uses sda to boot. sda suffers a bad failure, data is corrupted, it in no way is a functional boot drive, expect for the fact that the motherboard can still detect it & sees some sort of boot partition on it. The motherboard would still try to use sda to boot (the boot won’t be successful).
In this example, you’d need to either change the bios to use sdb, or disconnect sda.
The mirror’d boot drives feature is more for total drive failure (no longer detectable), or so that you can hotswap a failed/failing boot drive without shutting down the system (gotta get that 99.999% uptime). It is a lot of fun to pull a boot drive with the system still running & have a new one resilvered & have no downtime, but realistically not the most useful feature for a home user.
/end of theoretical example.
…Anyway, going back to the original question, @SmallBarky was right & the smart outputs are indeed present for the boot drives. In one of them I have nothing but unknown attribute; always useful… In the other there is an error:
Error -4 occurred at disk power-on lifetime: 0 hours (0 days + 0 hours)
When the command that caused the error occurred, the device was in an unknown state.
Lets go with basics for now; try reseating the connections to “KINGSTON SKC600MS512G Serial Number: 50026B77858E2966”. If possible, try a different sata data cable & a different port on the motherboard. It could be that simple.
If @winnielinnie was here, he’d tell you to run memtest for the next few days 
Edit: typos, corrections, and readability edits. tldr; Barky was right. Mirrored boot are both active & system should still run without needing a reboot in case of single failure. Reseat/swap cables, move ports, retest. Ends with a joke.
thanks for all the info/suggestions
i will look into this.