Degraded Pool, Faulted Drive (15 Read Errors), No known data errors

Hurlikus

Cadet
Joined
Sep 21, 2022
Messages
4
Hi everybody

I've got the alert for the first time a few days ago that my pool is degraded due to 15 read errors on one of the drives (see picture below). I've completed a long S.M.A.R.T. test and did a scrub since which did not resolve it. The hardware of my PC is in my signature.

Screenshot 2023-11-07 112649.png


Output for smartctl -a /dev/sdf


Code:
root@truenas[~]# smartctl -a /dev/sdf
smartctl 7.2 2020-12-30 r5155 [x86_64-linux-5.15.131+truenas] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model:     WDC WD80EFZZ-68BTXN0
Serial Number:    WD-CA2L12BK
LU WWN Device Id: 5 0014ee 2c0438d9b
Firmware Version: 81.00A81
User Capacity:    8,001,563,222,016 bytes [8.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5640 rpm
Form Factor:      3.5 inches
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-3 T13/2161-D revision 5
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Tue Nov  7 11:29:48 2023 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:  (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:                (18164) 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:            (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:        ( 884) minutes.
SCT capabilities:              (0x303d) 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   188   188   021    Pre-fail  Always       -       9566
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       20
  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   093   093   000    Old_age   Always       -       5496
 10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0
 11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       11
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       7
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       28
194 Temperature_Celsius     0x0022   119   097   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      -       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%      5488         -
# 2  Short offline       Completed without error       00%      5413         -
# 3  Short offline       Completed without error       00%      5365         -
# 4  Short offline       Completed without error       00%      5317         -
# 5  Short offline       Completed without error       00%      5244         -
# 6  Short offline       Completed without error       00%      5196         -
# 7  Short offline       Completed without error       00%      5148         -
# 8  Short offline       Completed without error       00%      5076         -
# 9  Short offline       Completed without error       00%      5028         -
#10  Short offline       Completed without error       00%      4980         -
#11  Short offline       Completed without error       00%      4908         -
#12  Short offline       Completed without error       00%      4860         -
#13  Short offline       Completed without error       00%      4812         -
#14  Short offline       Completed without error       00%      4740         -
#15  Short offline       Completed without error       00%      4693         -
#16  Short offline       Completed without error       00%      4645         -
#17  Short offline       Completed without error       00%      4573         -
#18  Short offline       Completed without error       00%      4525         -
#19  Extended offline    Completed without error       00%      4480         -
#20  Short offline       Completed without error       00%      4405         -
#21  Short offline       Completed without error       00%      4357         -

Selective Self-tests/Logging not supported


Output for zpool status -v
Code:
root@truenas[~]# zpool status -v
  pool: boot-pool
 state: ONLINE
status: Some supported and requested features are not enabled on the pool.
        The pool can still be used, but some features are unavailable.
action: Enable all features using 'zpool upgrade'. Once this is done,
        the pool may no longer be accessible by software that does not support
        the features. See zpool-features(7) for details.
  scan: scrub repaired 0B in 00:02:01 with 0 errors on Wed Nov  1 03:47:02 2023
config:

        NAME        STATE     READ WRITE CKSUM
        boot-pool   ONLINE       0     0     0
          sda3      ONLINE       0     0     0

errors: No known data errors

  pool: storage0
 state: DEGRADED
status: One or more devices are faulted in response to persistent errors.
        Sufficient replicas exist for the pool to continue functioning in a
        degraded state.
action: Replace the faulted device, or use 'zpool clear' to mark the device
        repaired.
  scan: scrub repaired 0B in 05:30:34 with 0 errors on Tue Nov  7 03:15:10 2023
config:

        NAME                                      STATE     READ WRITE CKSUM
        storage0                                  DEGRADED     0     0     0
          raidz2-0                                DEGRADED     0     0     0
            2efc6d96-3c27-490c-953b-9b205f81e679  FAULTED     15     0     0  too many errors
            e406c91a-5d0e-407d-8ec2-c7b9d4ee4025  ONLINE       0     0     0
            c620bc69-66c3-4589-8e9b-a375bc3ea9c5  ONLINE       0     0     0
            ab75c80d-f093-42f5-81d1-2c68ecd07428  ONLINE       0     0     0
            aa729717-a79c-4e9a-b47c-7a08c2b00f6b  ONLINE       0     0     0

errors: No known data errors


While the the S.M.A.R.T. tests don't show anything remarkable (as far as i can tell) and the pool status sais "no known data errors" I'm at a loss to what the problem is. What do I need to do to clear the degraded status?

If of importance: a few days prior to the error showing up i shut down the system via webinterface, opened the case up and cleaned it and the airfilters with canned air.
 

Alecmascot

Guru
Joined
Mar 18, 2014
Messages
1,177

Hurlikus

Cadet
Joined
Sep 21, 2022
Messages
4
But is there in fact a persistent issue that I'm not recognizing or has the issue been resolved through a scrub?
 

Hurlikus

Cadet
Joined
Sep 21, 2022
Messages
4
Okay, I did the command you wrote and it did a resilvering process and now everythring is back to normal. So am I correct with my assumtion that everything is 'back to normal' now?
 

Alecmascot

Guru
Joined
Mar 18, 2014
Messages
1,177
Okay, I did the command you wrote and it did a resilvering process and now everythring is back to normal. So am I correct with my assumtion that everything is 'back to normal' now?
There is no reason it will not happen again....
Maybe the Sata Expansion card.
Look at using an LSI HBA for extra sata ports.
 
Top