Scrub Failed, GUI Non-Responsive, zpool errors

[Drew Heath]

I am have an issue post upgrade to Scale where the system is unresponsive (GUI/SSH/Shares) after an OS disk scrub. Strangely enough, the apps that are running still function. Post rebooting, the system returns to normal.

The following is listed in the GUI:

Boot pool status is DEGRADED: One or more devices has experienced an unrecoverable error. An attempt was made to correct the error. Applications are unaffected..​

I ran an extended smart test on the boot ssd, where I think the drive is okay:

smartctl 7.2 2020-12-30 r5155 [x86_64-linux-5.10.142+truenas] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family: SandForce Driven SSDs
Device Model: Corsair Force LS SSD
Serial Number: 16088024000104780263
Firmware Version: S9FM02.6
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
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-3 (minor revision not indicated)
SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Mon Dec 5 23:00:41 2022 PST
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: ( 30) 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: ( 2) minutes.
Conveyance self-test routine
recommended polling time: ( 2) minutes.

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 100 100 050 Pre-fail Always - 0/0
5 Retired_Block_Count 0x0013 100 100 050 Pre-fail Always - 0
9 Power_On_Hours_and_Msec 0x0012 100 100 000 Old_age Always - 13714h+00m+00.000s
12 Power_Cycle_Count 0x0012 100 100 000 Old_age Always - 62
162 Unknown_SandForce_Attr 0x0003 081 081 000 Pre-fail Always - 54
170 Reserve_Block_Count 0x0002 100 100 000 Old_age Always - 172
172 Erase_Fail_Count 0x0012 100 100 000 Old_age Always - 0
173 Unknown_SandForce_Attr 0x0000 100 100 000 Old_age Offline - 1704118
174 Unexpect_Power_Loss_Ct 0x0012 100 100 000 Old_age Always - 5
181 Program_Fail_Count 0x0012 100 100 000 Old_age Always - 0
187 Reported_Uncorrect 0x0012 100 100 000 Old_age Always - 1
192 Power-Off_Retract_Count 0x0012 100 100 000 Old_age Always - 5
194 Temperature_Celsius 0x0023 070 070 000 Pre-fail Always - 30
196 Reallocated_Event_Count 0x0000 100 100 000 Old_age Offline - 0
218 Unknown_SandForce_Attr 0x0000 100 100 000 Old_age Offline - 73
231 SSD_Life_Left 0x0013 100 100 000 Pre-fail Always - 99
241 Lifetime_Writes_GiB 0x0012 100 100 000 Old_age Always - 701
242 Lifetime_Reads_GiB 0x0012 100 100 000 Old_age Always - 1685

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% 13699 -


A zpool status however shows the boot pool as degraded:
pool: freenas-boot
state: DEGRADED
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 00:02:20 with 0 errors on Thu Dec 1 03:47:21 2022
config:

NAME STATE READ WRITE CKSUM
freenas-boot DEGRADED 0 0 0
sdb DEGRADED 4 440 0 too many errors


I have a new drive on order, but based on smart I am not sure the disk is the issue. Thank you in advance for your time and advice!

 

[morganL]

Its possible for ZFS to detect bit corruption issues that are not seen by the drive and displayed in the SMART tests.

Some corruptions can cause issues... others may be benign. If these errors repeat, its best to replace the drive. If you are not sure, perhaps re-use the drive and try it again.

 

[Drew Heath]

Thanks for the reply. I will use the new drive on a fresh install and report back here if any errors persist.