ZPool degraded, but I can't see which disk is the issue

D

Dave Cullen

Cadet
Joined
Dec 18, 2016
Messages
2
Hello, I'm using FreeNas 9.10 and my zpool is showing as degraded on the system. It's a mirror, but I can't see which of the two disks is supposedly the problem.

The drives are WD Red 4TB. I've tried running SMART tests on the two disks, but there doesn't seem to be anything obvious in the results (below) to show what the issue is and I can't find anything in the GIU. Can anyone give me some pointers? Thanks in advance.

Happy to post full details of system if required, but I'm assuming they aren't relevant at this stage.

Code:
smartctl 6.5 2016-05-07 r4318 [FreeBSD 10.3-STABLE amd64] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Red (SMR)
Device Model:     WDC WD40EFAX-68JH4N0
Serial Number:    WD-WX61DC9CCLDE
LU WWN Device Id: 5 0014ee 212387a4e
Firmware Version: 82.00A82
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5400 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
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 Oct  5 15:20:49 2021 BST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

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

General SMART Values:
Offline data collection status:  (0x00)    Offline data collection activity
                    was never started.
                    Auto Offline Data Collection: Disabled.
Self-test execution status:      ( 241)    Self-test routine in progress...
                    10% of test remaining.
Total time to complete Offline
data collection:         ( 7904) seconds.
Offline data collection
capabilities:              (0x7b) SMART execute Offline immediate.
                    Auto Offline data collection on/off support.
                    Suspend Offline collection upon new
                    command.
                    Offline surface scan supported.
                    Self-test supported.
                    Conveyance Self-test supported.
                    Selective Self-test supported.
SMART capabilities:            (0x0003)    Saves SMART data before entering
                    power-saving mode.
                    Supports SMART auto save timer.
Error logging capability:        (0x01)    Error logging supported.
                    General Purpose Logging supported.
Short self-test routine
recommended polling time:      (   2) minutes.
Extended self-test routine
recommended polling time:      ( 485) minutes.
Conveyance self-test routine
recommended polling time:      (   2) minutes.
SCT capabilities:            (0x3039)    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   205   204   021    Pre-fail  Always       -       2733
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       49
  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   092   092   000    Old_age   Always       -       6476
 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       -       49
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       10
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       104
194 Temperature_Celsius     0x0022   120   113   000    Old_age   Always       -       27
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0030   100   253   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x0008   100   253   000    Old_age   Offline      -       0

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed without error       00%      6427         -
# 2  Extended offline    Aborted by host               90%      6427         -
# 3  Extended offline    Aborted by host               80%        22         -
# 4  Conveyance offline  Completed without error       00%        20         -
# 5  Short offline       Completed without error       00%        20         -

SMART Selective self-test log data structure revision number 1
 SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
    1        0        0  Not_testing
    2        0        0  Not_testing
    3        0        0  Not_testing
    4        0        0  Not_testing
    5        0        0  Not_testing
Selective self-test flags (0x0):
  After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.

Code:
smartctl 6.5 2016-05-07 r4318 [FreeBSD 10.3-STABLE amd64] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Red (SMR)
Device Model:     WDC WD40EFAX-68JH4N0
Serial Number:    WD-WX61DC9K76PY
LU WWN Device Id: 5 0014ee 2678dc70f
Firmware Version: 82.00A82
User Capacity:    4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5400 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
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 Oct  5 15:21:35 2021 BST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

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

General SMART Values:
Offline data collection status:  (0x00)    Offline data collection activity
                    was never started.
                    Auto Offline Data Collection: Disabled.
Self-test execution status:      (   0)    The previous self-test routine completed
                    without error or no self-test has ever
                    been run.
Total time to complete Offline
data collection:         ( 9584) seconds.
Offline data collection
capabilities:              (0x7b) SMART execute Offline immediate.
                    Auto Offline data collection on/off support.
                    Suspend Offline collection upon new
                    command.
                    Offline surface scan supported.
                    Self-test supported.
                    Conveyance Self-test supported.
                    Selective Self-test supported.
SMART capabilities:            (0x0003)    Saves SMART data before entering
                    power-saving mode.
                    Supports SMART auto save timer.
Error logging capability:        (0x01)    Error logging supported.
                    General Purpose Logging supported.
Short self-test routine
recommended polling time:      (   2) minutes.
Extended self-test routine
recommended polling time:      ( 440) minutes.
Conveyance self-test routine
recommended polling time:      (   3) minutes.
SCT capabilities:            (0x3039)    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   205   197   021    Pre-fail  Always       -       2716
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       49
  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   092   092   000    Old_age   Always       -       6476
 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       -       49
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       11
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       106
194 Temperature_Celsius     0x0022   120   113   000    Old_age   Always       -       27
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%      6458         -
# 2  Extended offline    Completed without error       00%      6435         -
# 3  Short offline       Completed without error       00%      6427         -

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.
 
Redcoat

Redcoat

MVP
Joined
Feb 18, 2014
Messages
2,925
What does zpool status -v (in the shell) output?

Note that you have SMR drives which are not recommended for FreeNAS/TrueNAS, though not clear this is related to your issue today.

Not the issue at hand, but why are you still on such an old version of FreeNAS?
 
D

Dave Cullen

Cadet
Joined
Dec 18, 2016
Messages
2
Thanks. Output of zpool status -v is:

Code:
pool: freenas-boot
 state: ONLINE
  scan: scrub repaired 0 in 0h1m with 0 errors on Tue Oct  5 03:46:46 2021
config:

    NAME        STATE     READ WRITE CKSUM
    freenas-boot  ONLINE       0     0     0
      mirror-0  ONLINE       0     0     0
        da1p2   ONLINE       0     0     0
        da0p2   ONLINE       0     0     0

errors: No known data errors

  pool: main
 state: DEGRADED
status: One or more devices could not be opened.  Sufficient replicas exist for
    the pool to continue functioning in a degraded state.
action: Attach the missing device and online it using 'zpool online'.
   see: http://illumos.org/msg/ZFS-8000-2Q
  scan: scrub repaired 0 in 9h28m with 0 errors on Sun Aug  1 09:28:43 2021
config:

    NAME                                                STATE     READ WRITE CKSUM
    main                                                DEGRADED     0     0     0
      mirror-0                                          DEGRADED     0     0     0
        gptid/47b3eb19-c69b-11ea-9b09-d05099c108fd.eli  ONLINE       0     0     0
        3929490456171248803                             UNAVAIL      0     0     0  was /dev/gptid/8f20ce7a-c5e4-11ea-a6a6-d05099c108fd.eli

errors: No known data errors

  pool: oldmain
 state: UNAVAIL
status: One or more devices could not be opened.  There are insufficient
    replicas for the pool to continue functioning.
action: Attach the missing device and online it using 'zpool online'.
   see: http://illumos.org/msg/ZFS-8000-3C
  scan: none requested
config:

    NAME                      STATE     READ WRITE CKSUM
    oldmain                   UNAVAIL      0     0     0
      mirror-0                UNAVAIL      0     0     0
        2157650819743571096   UNAVAIL      0     0     0  was /dev/gptid/b46a1954-1b51-11e7-b9d0-d05099c108fd.eli
        14048525063853672611  UNAVAIL      0     0     0  was /dev/gptid/b529b194-1b51-11e7-b9d0-d05099c108fd.eli

The oldmain pool is an older copy of the pool that I duplicated onto the current drives when I needed more space. One of the drives it was on is still attached in the NAS, but it looks like the system can't see it. I guess I should delete the pool from the system at some point.

Noted re: the SMR drives. Is that a recommendation for reasons of data security, or drive wear?

I'm on such an old version because I have two young kids and putting aside enough time to migrate something that works OK is difficult! It's on the list though!
 
Redcoat

Redcoat

MVP
Joined
Feb 18, 2014
Messages
2,925
OK - you need to replace the unavailable drive in main (and, yes, I'd pull those of "oldmain", too).

Look at this from the resource section on SMR drives https://www.truenas.com/community/resources/list-of-known-smr-drives.141/

This SMR issue may bite you in the bum on resilver time as you rebuild your pool, even with a CMR drive as the replacement new drive.

Understood on the old version and "the list".
 
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