Degraded Pool with Faulted Disk

[racielrod]

It was about time I had my first "problem" with TrueNAS after a couple of years of being a happy user.

I got this email alert:

New alerts:
* Pool tank state is DEGRADED: One or more devices are faulted in response to
persistent errors. Sufficient replicas exist for the pool to continue
functioning in a degraded state.
The following devices are not healthy:

* Disk WDC WD30EFRX-68EUZN0 WD-WMC4N0J6V7SK is FAULTED

after receiving this a few days ago:

* Pool tank state is ONLINE: One or more devices has experienced an
unrecoverable error. An attempt was made to correct the error. Applications
are unaffected.

I ran a long SMART test following the HDD troubleshooting guide, and this was the result:

smartctl 7.2 2021-09-14 r5236 [FreeBSD 13.1-RELEASE-p7 amd64] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family: Western Digital Red
Device Model: WDC WD30EFRX-68EUZN0
Serial Number: WD-WMC4N0J6V7SK
LU WWN Device Id: 5 0014ee 6059e7e23
Firmware Version: 82.00A82
User Capacity: 3,000,592,982,016 bytes [3.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 5400 rpm
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-2 (minor revision not indicated)
SATA Version is: SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Tue Aug 1 17:40:48 2023 EDT
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: (41040) 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: ( 412) minutes.
Conveyance self-test routine
recommended polling time: ( 5) minutes.
SCT capabilities: (0x703d) 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 179 177 021 Pre-fail Always - 6041
4 Start_Stop_Count 0x0032 097 097 000 Old_age Always - 3768
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 059 059 000 Old_age Always - 30592
10 Spin_Retry_Count 0x0032 100 100 000 Old_age Always - 0
11 Calibration_Retry_Count 0x0032 100 100 000 Old_age Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 115
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 91
193 Load_Cycle_Count 0x0032 196 196 000 Old_age Always - 12197
194 Temperature_Celsius 0x0022 120 110 000 Old_age Always - 30
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 - 7
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% 30590 -
# 2 Short offline Completed without error 00% 30582 -
# 3 Extended offline Interrupted (host reset) 90% 30572 -
# 4 Extended offline Interrupted (host reset) 80% 30546 -
# 5 Extended offline Aborted by host 90% 30545 -
# 6 Extended offline Interrupted (host reset) 90% 30522 -
# 7 Short offline Completed without error 00% 30434 -
# 8 Extended offline Completed without error 00% 30342 -
# 9 Short offline Completed without error 00% 30319 -
#10 Short offline Completed without error 00% 30271 -
#11 Short offline Completed without error 00% 30103 -
#12 Extended offline Completed without error 00% 30013 -
#13 Short offline Completed without error 00% 29935 -
#14 Short offline Completed without error 00% 29719 -
#15 Extended offline Completed without error 00% 29630 -
#16 Short offline Completed without error 00% 29551 -
#17 Extended offline Completed without error 00% 29314 -
#18 Short offline Completed without error 00% 29235 -
#19 Short offline Completed without error 00% 28995 -
#20 Extended offline Completed without error 00% 28906 -
#21 Short offline Completed without error 00% 28828 -

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.

So the test PASSED and I only have errors on 199.

zpool status gives me this:

pool: tank
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 12.6M in 04:26:40 with 0 errors on Tue Aug 1 06:26:41 2023
config:

NAME STATE READ WRITE CKSUM
tank DEGRADED 0 0 0
raidz2-0 DEGRADED 0 0 0
gptid/744db245-2b53-11ea-bcd4-0025907d5fcc ONLINE 0 0 0
gptid/7611e383-2b53-11ea-bcd4-0025907d5fcc ONLINE 0 0 0
gptid/76f4acfe-2b53-11ea-bcd4-0025907d5fcc FAULTED 323 0 0 too many errors
gptid/79e1053e-2b53-11ea-bcd4-0025907d5fcc ONLINE 0 0 0
gptid/7c3c5e54-2b53-11ea-bcd4-0025907d5fcc ONLINE 0 0 0

errors: No known data errors

I recently (3 months ago) upgraded mobo, CPU and RAM but kept everything else.
My next step will be to replace the SATA cable and scrub the pool again.
If the problem persist, I will replace the drive.

Posting here more as a sounding board. This is the first time this happens to me, so I wanted to make sure I'm on the right course of action.

Should I consider something else?

Thanks!
R.

 

[Davvo]

zpool clear tank should bring the drive back into the pool.

Check power and data cables to see if they are correctly inserted on both ends. Just keep it under check and run a scrub to play safe.

Do you have a scrub schedule? Was either email you got related to one?

If you want to try a harder approach, take out the drive and run badblocks on it: if there are unreadable sectors it will mark them; or it might kill the drive, but it's unlikely.

 

[racielrod]

zpool clear tank should bring the drive back into the pool.

Check power and data cables to see if they are correctly inserted on both ends. Just keep it under check and run a scrub to play safe.

Do you have a scrub schedule? Was either email you got related to one?

If you want to try a harder approach, take out the drive and run badblocks on it: if there are unreadable sectors it will mark them; or it might kill the drive, but it's unlikely.

Yes, both emails were alerts after a regular schedule task. I believe they are 10 days apart.

 

[Davvo]

That's typical SMR behaviour, but you are using Red Plus (CMR drives), aren't you?

Inspect those connections, it's either those or the drive itself.

 

[racielrod]

That's typical SMR behaviour, but you are using Red Plus (CMR drives), aren't you?

Inspect those connections, it's either those or the drive itself.

Yes, WD30EFRX is CMR.
I will change the data cable today and run another scrub to see if that solves the problem.

 

[racielrod]

I changed the SATA cable, cleared the errors in the pool, and re-scrubbed and all seems to be fine.
No errors after the scrub ran, but I will keep an eye on it for now.
If I receive another error on the same HHD, I will replace it.