Hello,

I have ZFS running over LUKS encryption. ZFS out of a sudden started showing errors,

``` $zpool status pool: tank state: ONLINE status: One or more devices has experienced an unrecoverable error. An attempt was made to correct the error. Applications are unaffected. action: Determine if the device needs to be replaced, and clear the errors using zpool clear or replace the device with zpool replace. see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-9P scan: scrub repaired 0B in 10:13:00 with 0 errors on Fri Nov 17 01:43:01 2023 config:

NAME STATE READ WRITE CKSUM tank ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 disk1.eli ONLINE 0 0 0 disk2.eli ONLINE 0 184 4

errors: No known data errors ```

which also shows up in dmesg, ``` [76443.247801] zio pool=tank vdev=/dev/mapper/disk1.eli error=5 type=2 offset=2103171743744 size=53248 flags=1074267264 [80861.452444] zio pool=tank vdev=/dev/mapper/disk1.eli error=5 type=2 offset=1841919950848 size=40960 flags=1074267264 [82374.040979] zio pool=tank vdev=/dev/mapper/disk1.eli error=5 type=2 offset=7028176924672 size=4096 flags=1572992

```

However smart 'long' test shows up ok. There doesnt seems to be any sector errors,

```

smartctl -a /dev/sdc

smartctl 7.4 2023-08-01 r5530 [x86_64-linux-6.1.63-1-lts] (local build) Copyright (C) 2002-23, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION === Model Family: Western Digital Red Device Model: WDC WD80EFZX-68UW8N0 Firmware Version: 83.H0A83 User Capacity: 8,001,563,222,016 bytes [8.00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Rotation Rate: 5400 rpm Form Factor: 3.5 inches Device is: In smartctl database 7.3/5528 ATA Version is: ACS-2, ATA8-ACS T13/1699-D revision 4 SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s) Local Time is: Wed Nov 29 21:30:52 2023 IST SMART support is: Available - device has SMART capability. SMART support is: Enabled

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

General SMART Values: Offline data collection status: (0x82) Offline data collection activity was completed without error. Auto Offline Data Collection: Enabled. Self-test execution status: ( 0) The previous self-test routine completed without error or no self-test has ever been run. Total time to complete Offline data collection: ( 101) 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: (1100) minutes. SCT capabilities: (0x003d) SCT Status supported. SCT Error Recovery Control supported. SCT Feature Control supported. SCT Data Table supported.

SMART Attributes Data Structure revision number: 16 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always - 0 2 Throughput_Performance 0x0005 132 132 054 Pre-fail Offline - 112 3 Spin_Up_Time 0x0007 155 155 024 Pre-fail Always - 473 (Average 376) 4 Start_Stop_Count 0x0012 100 100 000 Old_age Always - 632 5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0 7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always - 0 8 Seek_Time_Performance 0x0005 128 128 020 Pre-fail Offline - 18 9 Power_On_Hours 0x0012 093 093 000 Old_age Always - 49433 10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 609 22 Helium_Level 0x0023 100 100 025 Pre-fail Always - 100 192 Power-Off_Retract_Count 0x0032 007 007 000 Old_age Always - 112187 193 Load_Cycle_Count 0x0012 007 007 000 Old_age Always - 112187 194 Temperature_Celsius 0x0002 171 171 000 Old_age Always - 35 (Min/Max 21/49) 196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0 197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x000a 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 Completed without error 00% 49409 -

2 Extended offline Completed without error 00% 49406 -

3 Extended offline Completed without error 00% 49405 -

4 Short offline Completed without error 00% 49405 -

5 Extended offline Completed without error 00% 41597 -

6 Extended offline Interrupted (host reset) 20% 41579 -

7 Short offline Completed without error 00% 21843 -

8 Short offline Completed without error 00% 10193 -

9 Extended offline Completed without error 00% 26 -

#10 Extended offline Aborted by host 40% 9 - #11 Short offline Completed without error 00% 0 - ```

Does this disk need to be replaced?