Cannot Import Pool to Truenas

TrueNAS General
1

Hi all,

The other day my NAS crashed and upon boot it froze. This had happened before so I disconnected my drives and got in to Truenas. Importing the pool crashes Truenas everytime. I have another pool running on an SSD that works fine. The problematic pool was able to be imported in to a Live Ubuntu and passed a scrub. I can currently mount the pool read only in Truenas. It consists of 2 12TB disks. I have tried to import the pool with just one disk connected and still doesn’t work. Does anyone have any ideas what it could be?

root@truenas[~]# zpool import pool: Server id: 3391941267228019394 state: ONLINE status: Some supported features are not enabled on the pool. (Note that they may be intentionally disabled if the 'compatibility' property is set.) action: The pool can be imported using its name or numeric identifier, though some features will not be available without an explicit 'zpool upgrade'. config: 
Server                                    ONLINE
  mirror-0                                ONLINE
    d3795f60-15ed-11ec-9c53-d8bbc115a125  ONLINE
    d88bf99f-b9aa-4ded-af57-b64782e2f7e6  ONLINE
  indirect-1                              ONLINE
2

First: please format the command output properly (in one set of three backticks each, not per line).

Does the TrueNAS console show any error messages when you now try to import it?
At which point did the boot freeze?
Attaching a copy of /var/log/syslog to this thread might also be helpful (just like a complete description of the hardware used and the TN version).

3

Sorry I’m not sure what happened with the formatting I’ll try fix it. I have tried to attach the syslog but it is over 4MB so have made it available here. It still cannot import. I was in debug kernel so switched that off and have tried to upgrade to 25.04 as well. It was the 19th-20th when it initially crashed.

4

That’s a really long syslog covering 70 different boots :sweat_smile:
Can you point me to a time where the system actually hung?

5

Hahah sorry, all of those boots are me because of it freezing due to pool import. At one point I was getting, WARNING: zfs: adding exisiting segment to range tree.

I have ran memtest86 and all was good and was live booting Ubuntu on same machine so don’t think it’s hardware related. Thinking I may have to rebuild the pool but am trying to avoid that as don’t really want to buy new drives. They are passing smart tests fine as well.

6

That still doesn’t help finding something useful in this huge log - athough just taking a quick look I saw multiple warnings about pending sectors on sda and sdb.

Also again: please provide a full description of your hardware.
I could see in your logs that you tried 24.10.2.4 and 25.04.2.4.

7

Sorry hardware is:

CPU: AMD Ryzen 5600G
Motherboard: ASRock B450M Mortar Max
RAM: 4 X 8GB Patriot Viper 3200MHz PC4-25600 Dual Memory Kit - PVS416G320C6
Storage: 60GB SSD (boot)
500GB Samsung 970 EVO NVME (Apps)
12TB Western Digital WD120EDBZ
12TB Seagate Exos X16 ST12000NM01G

sda is the 60gb drive

8

Thanks for the hardware description.
A particular point in time for which I could check the log in more depth as well as output of smartctl -x for each disk (as I saw some warnings) would be very helpful.

9

See below requested SMART results. SDA is my boot drive and SDB/SDC are the mirrored drives in the pool I cannot import. Do you want me to take note of the time and try import the pool again so you can see it in the log?

SDA 
smartctl -x /dev/sda
smartctl 7.4 2023-08-01 r5530 [x86_64-linux-6.12.15-production+truenas] (local build)
Copyright (C) 2002-23, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model:     SSD 60GB
Serial Number:    AA000000000000000897
Firmware Version: Q0816C0
User Capacity:    60,022,480,896 bytes [60.0 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Form Factor:      2.5 inches
TRIM Command:     Available, deterministic, zeroed
Device is:        Not in smartctl database 7.3/5528
ATA Version is:   ACS-2 T13/2015-D revision 3
SATA Version is:  SATA 3.2, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Thu Sep 25 17:39:17 2025 AEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
AAM feature is:   Unavailable
APM feature is:   Disabled
Rd look-ahead is: Enabled
Write cache is:   Enabled
DSN feature is:   Unavailable
ATA Security is:  Disabled, frozen [SEC2]
Wt Cache Reorder: Unavailable

=== 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: 		(  120) seconds.
Offline data collection
capabilities: 			 (0x11) SMART execute Offline immediate.
					No Auto Offline data collection support.
					Suspend Offline collection upon new
					command.
					No Offline surface scan supported.
					Self-test supported.
					No Conveyance Self-test supported.
					No Selective Self-test supported.
SMART capabilities:            (0x0002)	Does not save 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: 	 (  10) minutes.

SMART Attributes Data Structure revision number: 1
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAGS    VALUE WORST THRESH FAIL RAW_VALUE
  1 Raw_Read_Error_Rate     -O--CK   100   100   050    -    0
  5 Reallocated_Sector_Ct   -O--CK   100   100   050    -    1
  9 Power_On_Hours          -O--CK   100   100   050    -    74368
 12 Power_Cycle_Count       -O--CK   100   100   050    -    507
160 Unknown_Attribute       -O--CK   100   100   050    -    0
161 Unknown_Attribute       PO--CK   100   100   050    -    98
163 Unknown_Attribute       -O--CK   100   100   050    -    12
164 Unknown_Attribute       -O--CK   100   100   050    -    1008310
165 Unknown_Attribute       -O--CK   100   100   050    -    3260
166 Unknown_Attribute       -O--CK   100   100   050    -    1580
167 Unknown_Attribute       -O--CK   100   100   050    -    2070
168 Unknown_Attribute       -O--CK   100   100   050    -    7000
169 Unknown_Attribute       -O--CK   100   100   050    -    71
175 Program_Fail_Count_Chip -O--CK   100   100   050    -    0
176 Erase_Fail_Count_Chip   -O--CK   100   100   050    -    0
177 Wear_Leveling_Count     -O--CK   100   100   050    -    0
178 Used_Rsvd_Blk_Cnt_Chip  -O--CK   100   100   050    -    1
181 Program_Fail_Cnt_Total  -O--CK   100   100   050    -    0
182 Erase_Fail_Count_Total  -O--CK   100   100   050    -    0
192 Power-Off_Retract_Count -O--CK   100   100   050    -    475
194 Temperature_Celsius     -O---K   100   100   050    -    40
195 Hardware_ECC_Recovered  -O--CK   100   100   050    -    4247579
196 Reallocated_Event_Count -O--CK   100   100   050    -    0
197 Current_Pending_Sector  -O--CK   100   100   050    -    1
198 Offline_Uncorrectable   -O--CK   100   100   050    -    0
199 UDMA_CRC_Error_Count    -O--CK   100   100   050    -    27
232 Available_Reservd_Space -O--CK   100   100   050    -    98
241 Total_LBAs_Written      ----CK   100   100   050    -    402878
242 Total_LBAs_Read         ----CK   100   100   050    -    283792
245 Unknown_Attribute       -O--CK   100   100   050    -    2787491
                            ||||||_ K auto-keep
                            |||||__ C event count
                            ||||___ R error rate
                            |||____ S speed/performance
                            ||_____ O updated online
                            |______ P prefailure warning

General Purpose Log Directory Version 1
SMART           Log Directory Version 1 [multi-sector log support]
Address    Access  R/W   Size  Description
0x00       GPL,SL  R/O      1  Log Directory
0x01           SL  R/O      1  Summary SMART error log
0x02           SL  R/O      1  Comprehensive SMART error log
0x03       GPL     R/O      1  Ext. Comprehensive SMART error log
0x04       GPL,SL  R/O      8  Device Statistics log
0x06           SL  R/O      1  SMART self-test log
0x07       GPL     R/O      1  Extended self-test log
0x10       GPL     R/O      1  NCQ Command Error log
0x11       GPL     R/O      1  SATA Phy Event Counters log
0x30       GPL,SL  R/O      9  IDENTIFY DEVICE data log
0x80-0x9f  GPL,SL  R/W     16  Host vendor specific log
0xde       GPL     VS       8  Device vendor specific log

SMART Extended Comprehensive Error Log Version: 1 (1 sectors)
Device Error Count: 49 (device log contains only the most recent 4 errors)
	CR     = Command Register
	FEATR  = Features Register
	COUNT  = Count (was: Sector Count) Register
	LBA_48 = Upper bytes of LBA High/Mid/Low Registers ]  ATA-8
	LH     = LBA High (was: Cylinder High) Register    ]   LBA
	LM     = LBA Mid (was: Cylinder Low) Register      ] Register
	LL     = LBA Low (was: Sector Number) Register     ]
	DV     = Device (was: Device/Head) Register
	DC     = Device Control Register
	ER     = Error register
	ST     = Status register
Powered_Up_Time is measured from power on, and printed as
DDd+hh:mm:SS.sss where DD=days, hh=hours, mm=minutes,
SS=sec, and sss=millisec. It "wraps" after 49.710 days.

Error 49 [0] log entry is empty
Error 48 [3] log entry is empty
Error 47 [2] log entry is empty
Error 46 [1] occurred at disk power-on lifetime: 0 hours (0 days + 0 hours)
  When the command that caused the error occurred, the device was active or idle.

  After command completion occurred, registers were:
  ER -- ST COUNT  LBA_48  LH LM LL DV DC
  -- -- -- == -- == == == -- -- -- -- --
  04 -- 51 00 00 00 00 00 00 00 00 40 00  Error: ABRT

  Commands leading to the command that caused the error were:
  CR FEATR COUNT  LBA_48  LH LM LL DV DC  Powered_Up_Time  Command/Feature_Name
  -- == -- == -- == == == -- -- -- -- --  ---------------  --------------------
  b0 00 d1 01 01 00 00 4f 00 c2 01 00 08     00:00:00.000  SMART READ ATTRIBUTE THRESHOLDS [OBS-4]
  2f 00 00 01 01 00 00 00 00 00 03 00 08     00:00:00.000  READ LOG EXT
  2f 00 00 01 01 00 00 00 00 00 00 00 08     00:00:00.000  READ LOG EXT
  b0 00 d5 01 01 00 00 4f 00 c2 00 00 08     00:00:00.000  SMART READ LOG
  b0 00 da 00 00 00 00 4f 00 c2 00 00 08     00:00:00.000  SMART RETURN STATUS

SMART Extended Self-test Log Version: 1 (1 sectors)
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Extended offline    Completed without error       00%      8230         -
# 2  Extended offline    Completed without error       00%      7315         -
# 3  Extended offline    Completed without error       00%      6399         -
# 4  Extended offline    Completed without error       00%      5526         -
# 5  Extended offline    Completed without error       00%      4614         -
# 6  Extended offline    Completed without error       00%      3756         -
# 7  Extended offline    Completed without error       00%      2847         -
# 8  Extended offline    Completed without error       00%      2055         -
# 9  Extended offline    Interrupted (host reset)      90%      1149         -
#10  Extended offline    Interrupted (host reset)      80%       357         -
#11  Extended offline    Completed without error       00%     65012         -
#12  Extended offline    Interrupted (host reset)      90%     64132         -
#13  Extended offline    Interrupted (host reset)      90%     63248         -
#14  Extended offline    Interrupted (host reset)      90%     62387         -
#15  Extended offline    Interrupted (host reset)      90%     61474         -
#16  Extended offline    Interrupted (host reset)      90%     60619         -
#17  Extended offline    Interrupted (host reset)      90%     59721         -
#18  Extended offline    Interrupted (host reset)      80%     58869         -
#19  Extended offline    Interrupted (host reset)      90%     57962         -

Selective Self-tests/Logging not supported

SCT Commands not supported

Device Statistics (GP Log 0x04)
Page  Offset Size        Value Flags Description
0x01  =====  =               =  ===  == General Statistics (rev 1) ==
0x01  0x008  4             507  ---  Lifetime Power-On Resets
0x01  0x010  4           74368  ---  Power-on Hours
0x01  0x018  6       633256887  ---  Logical Sectors Written
0x01  0x020  6           30482  ---  Number of Write Commands
0x01  0x028  6      1418780147  ---  Logical Sectors Read
0x01  0x030  6           17806  ---  Number of Read Commands
0x07  =====  =               =  ===  == Solid State Device Statistics (rev 1) ==
0x07  0x008  1              29  ---  Percentage Used Endurance Indicator
                                |||_ C monitored condition met
                                ||__ D supports DSN
                                |___ N normalized value

Pending Defects log (GP Log 0x0c) not supported

SATA Phy Event Counters (GP Log 0x11)
ID      Size     Value  Description
0x0001  4            0  Command failed due to ICRC error
0x0002  4            0  R_ERR response for data FIS
0x0005  4            0  R_ERR response for non-data FIS
0x000a  4            2  Device-to-host register FISes sent due to a COMRESET
SDB 
smartctl -x /dev/sdb
smartctl 7.4 2023-08-01 r5530 [x86_64-linux-6.12.15-production+truenas] (local build)
Copyright (C) 2002-23, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Seagate Exos X16
Device Model:     ST12000NM001G-2MV103
Serial Number:    ZL2ANWVY
LU WWN Device Id: 5 000c50 0c7be4f7e
Firmware Version: SB2D
User Capacity:    12,000,138,625,024 bytes [12.0 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:    Thu Sep 25 17:41:44 2025 AEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
AAM feature is:   Unavailable
APM feature is:   Unavailable
Rd look-ahead is: Enabled
Write cache is:   Enabled
DSN feature is:   Disabled
ATA Security is:  Disabled, frozen [SEC2]
Write SCT (Get) Feature Control Command failed: scsi error unsupported field in scsi command
Wt Cache Reorder: Unknown (SCT Feature Control command failed)

=== 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: 	 (1177) 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          FLAGS    VALUE WORST THRESH FAIL RAW_VALUE
  1 Raw_Read_Error_Rate     POSR--   081   064   044    -    136945784
  3 Spin_Up_Time            PO----   094   091   000    -    0
  4 Start_Stop_Count        -O--CK   100   100   020    -    161
  5 Reallocated_Sector_Ct   PO--CK   100   100   010    -    0
  7 Seek_Error_Rate         POSR--   087   060   045    -    455676185
  9 Power_On_Hours          -O--CK   088   088   000    -    11041
 10 Spin_Retry_Count        PO--C-   100   100   097    -    0
 12 Power_Cycle_Count       -O--CK   100   100   020    -    160
 18 Head_Health             PO-R--   100   100   050    -    0
187 Reported_Uncorrect      -O--CK   100   100   000    -    0
188 Command_Timeout         -O--CK   100   100   000    -    0
190 Airflow_Temperature_Cel -O---K   070   052   040    -    30 (Min/Max 15/31)
192 Power-Off_Retract_Count -O--CK   100   100   000    -    101
193 Load_Cycle_Count        -O--CK   082   082   000    -    37426
194 Temperature_Celsius     -O---K   030   048   000    -    30 (0 14 0 0 0)
197 Current_Pending_Sector  -O--C-   100   100   000    -    0
198 Offline_Uncorrectable   ----C-   100   100   000    -    0
199 UDMA_CRC_Error_Count    -OSRCK   200   200   000    -    0
200 Pressure_Limit          PO---K   100   100   001    -    0
240 Head_Flying_Hours       ------   100   253   000    -    7525h+05m+25.358s
241 Total_LBAs_Written      ------   100   253   000    -    152845753656
242 Total_LBAs_Read         ------   100   253   000    -    388179027920
                            ||||||_ K auto-keep
                            |||||__ C event count
                            ||||___ R error rate
                            |||____ S speed/performance
                            ||_____ O updated online
                            |______ P prefailure warning

General Purpose Log Directory Version 1
SMART           Log Directory Version 1 [multi-sector log support]
Address    Access  R/W   Size  Description
0x00       GPL,SL  R/O      1  Log Directory
0x01           SL  R/O      1  Summary SMART error log
0x02           SL  R/O      5  Comprehensive SMART error log
0x03       GPL     R/O      5  Ext. Comprehensive SMART error log
0x04       GPL     R/O    256  Device Statistics log
0x04       SL      R/O      8  Device Statistics log
0x06           SL  R/O      1  SMART self-test log
0x07       GPL     R/O      1  Extended self-test log
0x08       GPL     R/O      2  Power Conditions log
0x09           SL  R/W      1  Selective self-test log
0x0a       GPL     R/W      8  Device Statistics Notification
0x0c       GPL     R/O   2048  Pending Defects log
0x10       GPL     R/O      1  NCQ Command Error log
0x11       GPL     R/O      1  SATA Phy Event Counters log
0x13       GPL     R/O      1  SATA NCQ Send and Receive log
0x21       GPL     R/O      1  Write stream error log
0x22       GPL     R/O      1  Read stream error log
0x24       GPL     R/O    768  Current Device Internal Status Data log
0x2f       GPL     R/O      1  Set Sector Configuration
0x30       GPL,SL  R/O      9  IDENTIFY DEVICE data log
0x80-0x9f  GPL,SL  R/W     16  Host vendor specific log
0xa1       GPL,SL  VS     160  Device vendor specific log
0xa2       GPL     VS   16320  Device vendor specific log
0xa4       GPL,SL  VS     160  Device vendor specific log
0xa6       GPL     VS     192  Device vendor specific log
0xa8-0xa9  GPL,SL  VS     136  Device vendor specific log
0xab       GPL     VS       1  Device vendor specific log
0xad       GPL     VS      16  Device vendor specific log
0xbe-0xbf  GPL     VS   65535  Device vendor specific log
0xc1       GPL,SL  VS       8  Device vendor specific log
0xc3       GPL,SL  VS      56  Device vendor specific log
0xc7       GPL,SL  VS       8  Device vendor specific log
0xc9       GPL,SL  VS       8  Device vendor specific log
0xca       GPL,SL  VS      16  Device vendor specific log
0xcd       GPL,SL  VS       1  Device vendor specific log
0xce       GPL     VS       1  Device vendor specific log
0xcf       GPL     VS     512  Device vendor specific log
0xd1       GPL     VS     656  Device vendor specific log
0xd2       GPL     VS   10000  Device vendor specific log
0xd4       GPL     VS    2048  Device vendor specific log
0xda       GPL,SL  VS       1  Device vendor specific log
0xe0       GPL,SL  R/W      1  SCT Command/Status
0xe1       GPL,SL  R/W      1  SCT Data Transfer
0xe2       GPL,SL  -      160  Reserved

SMART Extended Comprehensive Error Log Version: 1 (5 sectors)
No Errors Logged

SMART Extended Self-test Log Version: 1 (1 sectors)
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Extended offline    Completed without error       00%     10494         -
# 2  Extended offline    Completed without error       00%      9750         -
# 3  Extended offline    Completed without error       00%      9006         -
# 4  Extended offline    Completed without error       00%      8296         -
# 5  Extended offline    Completed without error       00%      7552         -
# 6  Extended offline    Completed without error       00%      6850         -
# 7  Extended offline    Completed without error       00%      6106         -
# 8  Extended offline    Completed without error       00%      5456         -
# 9  Extended offline    Completed without error       00%      4713         -
#10  Extended offline    Completed without error       00%      4078         -
#11  Extended offline    Completed without error       00%      3346         -
#12  Extended offline    Completed without error       00%      2627         -
#13  Extended offline    Completed without error       00%      1904         -
#14  Extended offline    Completed without error       00%      1184         -
#15  Extended offline    Completed without error       00%       447         -
#16  Extended offline    Completed without error       00%        17         -
#17  Conveyance offline  Completed without error       00%         0         -
#18  Short offline       Completed without error       00%         0         -

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.

SCT Status Version:                  3
SCT Version (vendor specific):       522 (0x020a)
Device State:                        Active (0)
Current Temperature:                    30 Celsius
Power Cycle Min/Max Temperature:     14/31 Celsius
Lifetime    Min/Max Temperature:     13/48 Celsius
Under/Over Temperature Limit Count:   0/0
SMART Status:                        0xc24f (PASSED)
Vendor specific:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00

SCT Temperature History Version:     2
Temperature Sampling Period:         4 minutes
Temperature Logging Interval:        59 minutes
Min/Max recommended Temperature:     10/40 Celsius
Min/Max Temperature Limit:            5/60 Celsius
Temperature History Size (Index):    128 (104)

Index    Estimated Time   Temperature Celsius
 105    2025-09-20 12:35    33  **************
 106    2025-09-20 13:34    33  **************
 107    2025-09-20 14:33    33  **************
 108    2025-09-20 15:32    32  *************
 109    2025-09-20 16:31    32  *************
 110    2025-09-20 17:30    32  *************
 111    2025-09-20 18:29    33  **************
 112    2025-09-20 19:28    34  ***************
 ...    ..(  4 skipped).    ..  ***************
 117    2025-09-21 00:23    34  ***************
 118    2025-09-21 01:22    33  **************
 119    2025-09-21 02:21    33  **************
 120    2025-09-21 03:20    32  *************
 121    2025-09-21 04:19    32  *************
 122    2025-09-21 05:18    29  **********
 123    2025-09-21 06:17    30  ***********
 124    2025-09-21 07:16    31  ************
 125    2025-09-21 08:15    32  *************
 126    2025-09-21 09:14    33  **************
 127    2025-09-21 10:13    34  ***************
   0    2025-09-21 11:12    35  ****************
   1    2025-09-21 12:11    36  *****************
 ...    ..(  2 skipped).    ..  *****************
   4    2025-09-21 15:08    36  *****************
   5    2025-09-21 16:07    35  ****************
   6    2025-09-21 17:06    35  ****************
   7    2025-09-21 18:05    34  ***************
   8    2025-09-21 19:04    35  ****************
   9    2025-09-21 20:03     ?  -
  10    2025-09-21 21:02    29  **********
  11    2025-09-21 22:01     ?  -
  12    2025-09-21 23:00    29  **********
  13    2025-09-21 23:59     ?  -
  14    2025-09-22 00:58    29  **********
  15    2025-09-22 01:57     ?  -
  16    2025-09-22 02:56    30  ***********
  17    2025-09-22 03:55     ?  -
  18    2025-09-22 04:54    31  ************
  19    2025-09-22 05:53     ?  -
  20    2025-09-22 06:52    31  ************
  21    2025-09-22 07:51     ?  -
  22    2025-09-22 08:50    28  *********
  23    2025-09-22 09:49     ?  -
  24    2025-09-22 10:48    29  **********
  25    2025-09-22 11:47     ?  -
  26    2025-09-22 12:46    29  **********
  27    2025-09-22 13:45     ?  -
  28    2025-09-22 14:44    26  *******
  29    2025-09-22 15:43     ?  -
  30    2025-09-22 16:42    26  *******
  31    2025-09-22 17:41     ?  -
  32    2025-09-22 18:40    28  *********
  33    2025-09-22 19:39     ?  -
  34    2025-09-22 20:38    28  *********
  35    2025-09-22 21:37     ?  -
  36    2025-09-22 22:36    28  *********
  37    2025-09-22 23:35     ?  -
  38    2025-09-23 00:34    18  -
  39    2025-09-23 01:33     ?  -
  40    2025-09-23 02:32    20  *
  41    2025-09-23 03:31     ?  -
  42    2025-09-23 04:30    21  **
  43    2025-09-23 05:29     ?  -
  44    2025-09-23 06:28    25  ******
  45    2025-09-23 07:27    38  *******************
  46    2025-09-23 08:26     ?  -
  47    2025-09-23 09:25    35  ****************
  48    2025-09-23 10:24     ?  -
  49    2025-09-23 11:23    33  **************
  50    2025-09-23 12:22     ?  -
  51    2025-09-23 13:21    29  **********
  52    2025-09-23 14:20     ?  -
  53    2025-09-23 15:19    29  **********
  54    2025-09-23 16:18     ?  -
  55    2025-09-23 17:17    29  **********
  56    2025-09-23 18:16     ?  -
  57    2025-09-23 19:15    29  **********
  58    2025-09-23 20:14     ?  -
  59    2025-09-23 21:13    30  ***********
  60    2025-09-23 22:12     ?  -
  61    2025-09-23 23:11    29  **********
  62    2025-09-24 00:10     ?  -
  63    2025-09-24 01:09    29  **********
  64    2025-09-24 02:08     ?  -
  65    2025-09-24 03:07    30  ***********
  66    2025-09-24 04:06     ?  -
  67    2025-09-24 05:05    29  **********
  68    2025-09-24 06:04    36  *****************
  69    2025-09-24 07:03    36  *****************
  70    2025-09-24 08:02    35  ****************
  71    2025-09-24 09:01    34  ***************
  72    2025-09-24 10:00    33  **************
  73    2025-09-24 10:59    35  ****************
  74    2025-09-24 11:58    34  ***************
  75    2025-09-24 12:57    34  ***************
  76    2025-09-24 13:56    33  **************
  77    2025-09-24 14:55    33  **************
  78    2025-09-24 15:54    32  *************
  79    2025-09-24 16:53    33  **************
  80    2025-09-24 17:52    35  ****************
  81    2025-09-24 18:51    36  *****************
  82    2025-09-24 19:50    37  ******************
 ...    ..(  2 skipped).    ..  ******************
  85    2025-09-24 22:47    37  ******************
  86    2025-09-24 23:46     ?  -
  87    2025-09-25 00:45    28  *********
  88    2025-09-25 01:44     ?  -
  89    2025-09-25 02:43    29  **********
  90    2025-09-25 03:42     ?  -
  91    2025-09-25 04:41    30  ***********
  92    2025-09-25 05:40     ?  -
  93    2025-09-25 06:39    31  ************
  94    2025-09-25 07:38    29  **********
  95    2025-09-25 08:37     ?  -
  96    2025-09-25 09:36    14  -
  97    2025-09-25 10:35    23  ****
 ...    ..(  3 skipped).    ..  ****
 101    2025-09-25 14:31    23  ****
 102    2025-09-25 15:30    31  ************
 103    2025-09-25 16:29    31  ************
 104    2025-09-25 17:28    31  ************

SCT Error Recovery Control:
           Read:    100 (10.0 seconds)
          Write:    100 (10.0 seconds)

Device Statistics (GP Log 0x04)
Page  Offset Size        Value Flags Description
0x01  =====  =               =  ===  == General Statistics (rev 1) ==
0x01  0x008  4             160  ---  Lifetime Power-On Resets
0x01  0x010  4           11041  ---  Power-on Hours
0x01  0x018  6    152833881240  ---  Logical Sectors Written
0x01  0x020  6       573535442  ---  Number of Write Commands
0x01  0x028  6    388146867391  ---  Logical Sectors Read
0x01  0x030  6       595593224  ---  Number of Read Commands
0x01  0x038  6               -  ---  Date and Time TimeStamp
0x03  =====  =               =  ===  == Rotating Media Statistics (rev 1) ==
0x03  0x008  4           10857  ---  Spindle Motor Power-on Hours
0x03  0x010  4            9763  ---  Head Flying Hours
0x03  0x018  4           37426  ---  Head Load Events
0x03  0x020  4               0  ---  Number of Reallocated Logical Sectors
0x03  0x028  4               0  ---  Read Recovery Attempts
0x03  0x030  4               0  ---  Number of Mechanical Start Failures
0x03  0x038  4               0  ---  Number of Realloc. Candidate Logical Sectors
0x03  0x040  4             101  ---  Number of High Priority Unload Events
0x04  =====  =               =  ===  == General Errors Statistics (rev 1) ==
0x04  0x008  4               0  ---  Number of Reported Uncorrectable Errors
0x04  0x010  4               0  ---  Resets Between Cmd Acceptance and Completion
0x04  0x018  4               0  -D-  Physical Element Status Changed
0x05  =====  =               =  ===  == Temperature Statistics (rev 1) ==
0x05  0x008  1              30  ---  Current Temperature
0x05  0x010  1              34  ---  Average Short Term Temperature
0x05  0x018  1              29  ---  Average Long Term Temperature
0x05  0x020  1              48  ---  Highest Temperature
0x05  0x028  1              20  ---  Lowest Temperature
0x05  0x030  1              41  ---  Highest Average Short Term Temperature
0x05  0x038  1              22  ---  Lowest Average Short Term Temperature
0x05  0x040  1              35  ---  Highest Average Long Term Temperature
0x05  0x048  1              27  ---  Lowest Average Long Term Temperature
0x05  0x050  4               0  ---  Time in Over-Temperature
0x05  0x058  1              60  ---  Specified Maximum Operating Temperature
0x05  0x060  4               0  ---  Time in Under-Temperature
0x05  0x068  1               5  ---  Specified Minimum Operating Temperature
0x06  =====  =               =  ===  == Transport Statistics (rev 1) ==
0x06  0x008  4             997  ---  Number of Hardware Resets
0x06  0x010  4             521  ---  Number of ASR Events
0x06  0x018  4               0  ---  Number of Interface CRC Errors
0xff  =====  =               =  ===  == Vendor Specific Statistics (rev 1) ==
0xff  0x008  7               0  ---  Vendor Specific
0xff  0x010  7               0  ---  Vendor Specific
0xff  0x018  7               0  ---  Vendor Specific
                                |||_ C monitored condition met
                                ||__ D supports DSN
                                |___ N normalized value

Pending Defects log (GP Log 0x0c)
No Defects Logged

SATA Phy Event Counters (GP Log 0x11)
ID      Size     Value  Description
0x000a  2            3  Device-to-host register FISes sent due to a COMRESET
0x0001  2            0  Command failed due to ICRC error
0x0003  2            0  R_ERR response for device-to-host data FIS
0x0004  2            0  R_ERR response for host-to-device data FIS
0x0006  2            0  R_ERR response for device-to-host non-data FIS
0x0007  2            0  R_ERR response for host-to-device non-data FIS

Seagate FARM log (GP Log 0xa6) supported [try: -l farm]
SDC 

smartctl -x /dev/sdc
smartctl 7.4 2023-08-01 r5530 [x86_64-linux-6.12.15-production+truenas] (local build)
Copyright (C) 2002-23, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model:     WDC WD120EDBZ-11B1HA0
Serial Number:    5QG3DNYF
LU WWN Device Id: 5 000cca 2b0c18cb2
Firmware Version: 85.00A85
User Capacity:    12,000,138,625,024 bytes [12.0 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        Not in smartctl database 7.3/5528
ATA Version is:   ACS-2, ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.2, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Thu Sep 25 17:43:21 2025 AEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
AAM feature is:   Unavailable
APM feature is:   Disabled
Rd look-ahead is: Enabled
Write cache is:   Enabled
DSN feature is:   Unavailable
ATA Security is:  Disabled, frozen [SEC2]
Wt Cache Reorder: Enabled

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

General SMART Values:
Offline data collection status:  (0x80)	Offline data collection activity
					was never started.
					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: 		(   87) 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: 	 (1169) 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          FLAGS    VALUE WORST THRESH FAIL RAW_VALUE
  1 Raw_Read_Error_Rate     PO-R--   100   100   016    -    0
  2 Throughput_Performance  --S---   129   129   054    -    104
  3 Spin_Up_Time            POS---   253   253   024    -    220 (Average 245)
  4 Start_Stop_Count        -O--C-   100   100   000    -    234
  5 Reallocated_Sector_Ct   PO--CK   100   100   005    -    0
  7 Seek_Error_Rate         -O-R--   100   100   067    -    0
  8 Seek_Time_Performance   --S---   128   128   020    -    18
  9 Power_On_Hours          -O--C-   096   096   000    -    34632
 10 Spin_Retry_Count        -O--C-   100   100   060    -    0
 12 Power_Cycle_Count       -O--CK   100   100   000    -    234
 22 Unknown_Attribute       PO---K   100   100   025    -    100
192 Power-Off_Retract_Count -O--CK   099   099   000    -    1605
193 Load_Cycle_Count        -O--C-   099   099   000    -    1605
194 Temperature_Celsius     -O----   191   191   000    -    34 (Min/Max 8/51)
196 Reallocated_Event_Count -O--CK   100   100   000    -    0
197 Current_Pending_Sector  -O---K   100   100   000    -    0
198 Offline_Uncorrectable   ---R--   100   100   000    -    0
199 UDMA_CRC_Error_Count    -O-R--   200   200   000    -    0
                            ||||||_ K auto-keep
                            |||||__ C event count
                            ||||___ R error rate
                            |||____ S speed/performance
                            ||_____ O updated online
                            |______ P prefailure warning

General Purpose Log Directory Version 1
SMART           Log Directory Version 1 [multi-sector log support]
Address    Access  R/W   Size  Description
0x00       GPL,SL  R/O      1  Log Directory
0x01           SL  R/O      1  Summary SMART error log
0x02           SL  R/O      1  Comprehensive SMART error log
0x03       GPL     R/O      1  Ext. Comprehensive SMART error log
0x04       GPL     R/O    256  Device Statistics log
0x04       SL      R/O    255  Device Statistics log
0x06           SL  R/O      1  SMART self-test log
0x07       GPL     R/O      1  Extended self-test log
0x08       GPL     R/O      2  Power Conditions log
0x09           SL  R/W      1  Selective self-test log
0x0c       GPL     R/O   5501  Pending Defects log
0x10       GPL     R/O      1  NCQ Command Error log
0x11       GPL     R/O      1  SATA Phy Event Counters log
0x12       GPL     R/O      1  SATA NCQ Non-Data log
0x13       GPL     R/O      1  SATA NCQ Send and Receive log
0x15       GPL     R/W      1  Rebuild Assist log
0x21       GPL     R/O      1  Write stream error log
0x22       GPL     R/O      1  Read stream error log
0x24       GPL     R/O    256  Current Device Internal Status Data log
0x25       GPL     R/O    256  Saved Device Internal Status Data log
0x30       GPL,SL  R/O      9  IDENTIFY DEVICE data log
0x80-0x9f  GPL,SL  R/W     16  Host vendor specific log
0xe0       GPL,SL  R/W      1  SCT Command/Status
0xe1       GPL,SL  R/W      1  SCT Data Transfer

SMART Extended Comprehensive Error Log Version: 1 (1 sectors)
No Errors Logged

SMART Extended Self-test Log Version: 1 (1 sectors)
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Extended offline    Completed without error       00%     34087         -
# 2  Extended offline    Completed without error       00%     33343         -
# 3  Extended offline    Completed without error       00%     32599         -
# 4  Extended offline    Completed without error       00%     31889         -
# 5  Extended offline    Completed without error       00%     31145         -
# 6  Extended offline    Completed without error       00%     30443         -
# 7  Extended offline    Completed without error       00%     29699         -
# 8  Extended offline    Completed without error       00%     29050         -
# 9  Extended offline    Completed without error       00%     28306         -
#10  Extended offline    Completed without error       00%     27673         -
#11  Extended offline    Completed without error       00%     26944         -
#12  Extended offline    Completed without error       00%     26230         -
#13  Extended offline    Completed without error       00%     25499         -
#14  Extended offline    Completed without error       00%     24779         -
#15  Extended offline    Completed without error       00%     24040         -
#16  Extended offline    Completed without error       00%     23315         -
#17  Extended offline    Completed without error       00%     22584         -
#18  Extended offline    Completed without error       00%     21886         -
#19  Extended offline    Completed without error       00%     21144         -

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.

SCT Status Version:                  3
SCT Version (vendor specific):       256 (0x0100)
Device State:                        Active (0)
Current Temperature:                    34 Celsius
Power Cycle Min/Max Temperature:     13/35 Celsius
Lifetime    Min/Max Temperature:      8/51 Celsius
Under/Over Temperature Limit Count:   0/0

SCT Temperature History Version:     2
Temperature Sampling Period:         1 minute
Temperature Logging Interval:        1 minute
Min/Max recommended Temperature:      0/65 Celsius
Min/Max Temperature Limit:           -40/70 Celsius
Temperature History Size (Index):    128 (39)

Index    Estimated Time   Temperature Celsius
  40    2025-09-25 15:36    35  ****************
 ...    ..(117 skipped).    ..  ****************
  30    2025-09-25 17:34    35  ****************
  31    2025-09-25 17:35    34  ***************
 ...    ..(  6 skipped).    ..  ***************
  38    2025-09-25 17:42    34  ***************
  39    2025-09-25 17:43    35  ****************

SCT Error Recovery Control:
           Read: Disabled
          Write: Disabled

Device Statistics (GP Log 0x04)
Page  Offset Size        Value Flags Description
0x01  =====  =               =  ===  == General Statistics (rev 1) ==
0x01  0x008  4             234  ---  Lifetime Power-On Resets
0x01  0x010  4           34632  ---  Power-on Hours
0x01  0x018  6    150263251671  ---  Logical Sectors Written
0x01  0x020  6      1363863332  ---  Number of Write Commands
0x01  0x028  6    726375137284  ---  Logical Sectors Read
0x01  0x030  6      1145459210  ---  Number of Read Commands
0x01  0x038  6    124678575100  ---  Date and Time TimeStamp
0x03  =====  =               =  ===  == Rotating Media Statistics (rev 1) ==
0x03  0x008  4           33535  ---  Spindle Motor Power-on Hours
0x03  0x010  4           33535  ---  Head Flying Hours
0x03  0x018  4            1605  ---  Head Load Events
0x03  0x020  4               0  ---  Number of Reallocated Logical Sectors
0x03  0x028  4               8  ---  Read Recovery Attempts
0x03  0x030  4               0  ---  Number of Mechanical Start Failures
0x04  =====  =               =  ===  == General Errors Statistics (rev 1) ==
0x04  0x008  4               0  ---  Number of Reported Uncorrectable Errors
0x04  0x010  4               0  ---  Resets Between Cmd Acceptance and Completion
0x05  =====  =               =  ===  == Temperature Statistics (rev 1) ==
0x05  0x008  1              34  ---  Current Temperature
0x05  0x010  1              32  N--  Average Short Term Temperature
0x05  0x018  1              31  N--  Average Long Term Temperature
0x05  0x020  1              51  ---  Highest Temperature
0x05  0x028  1               8  ---  Lowest Temperature
0x05  0x030  1              42  N--  Highest Average Short Term Temperature
0x05  0x038  1              18  N--  Lowest Average Short Term Temperature
0x05  0x040  1              37  N--  Highest Average Long Term Temperature
0x05  0x048  1              24  N--  Lowest Average Long Term Temperature
0x05  0x050  4               0  ---  Time in Over-Temperature
0x05  0x058  1              65  ---  Specified Maximum Operating Temperature
0x05  0x060  4               0  ---  Time in Under-Temperature
0x05  0x068  1               0  ---  Specified Minimum Operating Temperature
0x06  =====  =               =  ===  == Transport Statistics (rev 1) ==
0x06  0x008  4            1540  ---  Number of Hardware Resets
0x06  0x010  4             674  ---  Number of ASR Events
0x06  0x018  4               0  ---  Number of Interface CRC Errors
0xff  =====  =               =  ===  == Vendor Specific Statistics (rev 1) ==
                                |||_ C monitored condition met
                                ||__ D supports DSN
                                |___ N normalized value

Pending Defects log (GP Log 0x0c)
No Defects Logged

SATA Phy Event Counters (GP Log 0x11)
ID      Size     Value  Description
0x0001  2            0  Command failed due to ICRC error
0x0002  2            0  R_ERR response for data FIS
0x0003  2            0  R_ERR response for device-to-host data FIS
0x0004  2            0  R_ERR response for host-to-device data FIS
0x0005  2            0  R_ERR response for non-data FIS
0x0006  2            0  R_ERR response for device-to-host non-data FIS
0x0007  2            0  R_ERR response for host-to-device non-data FIS
0x0008  2            0  Device-to-host non-data FIS retries
0x0009  2            2  Transition from drive PhyRdy to drive PhyNRdy
0x000a  2            3  Device-to-host register FISes sent due to a COMRESET
0x000b  2            0  CRC errors within host-to-device FIS
0x000d  2            0  Non-CRC errors within host-to-device FIS
10

Your boot SSD looks weird. No proper model.
Also all recent SMART tests were interrupted and 49 errors logged.

It doesn’t look too bad but I wouldn’t trust this. Have you tried a different boot disk?

11

My boot SSD is weird its at least 6+ years old Aliexpress job. Could be the issue you think?

12

Your boot disk is on for 74368 hrs. aka 8.5 years. if that is true, its might be failing.

13

Yeah it would be about that old ahahaha. Would that affect a ZFS import though ?

14

If your boot disk is actually failing it could cause all kinds of weird behaviour.

15

Alright will try installing on a small hard drive to test. Will let you know what happens

16

I have tried with a fresh install on a different disk and still it is crashing when trying to import. I have attached logs from fresh install as well. I have had a quick look through, and I’m not sure what I’m looking for, but I can’t see any errors or warnings occurring when it restarts.

17

I might’ve overlooked something but the logs look fine to me.
If memtest was fine I don’t have many ideas left.

The power supply could theoretically also be the cause, failing PSUs create all kinds of weird errors and you said crashes had happended earlier but thats just a guess.

Do you have another computer on which you could boot truenas with the zfs disks attached?

18

I will try this tomorrow. Thanks for all the help by the way. If that doesn’t work do you think importing the pool in to Ubuntu, removing a drive from pool, creating a new pool and cloning to that one then trying to mount in truenas would be a possibility? I’m not sure what else I can try to preserve data besides buying another drive. It’s already been down for a week which is annoying.

19

It might if the crash was really while importing but your system reached truenas.target at which point the pools should be imported if I’m not mistaken (which I might be).

20

Would that be the case on the new system where I have never imported the pool however? I did the first boot, tried to import then crashed. It restarted and the pool wasn’t imported but was online and ready to import again.