CRITICAL ALERT: Device: /dev/ada0, 1 Currently unreadable (pending) sectors.

[geronimo1958]

Vol 1 is Healthy when I check the pool status.

This happened early Sunday morning.

Any advice on what to do? Reboot?

 

[Redcoat]

Run smartctl -t long /dev/ada0 and post the results here for review and advice.

 

[geronimo1958]

Run smartctl -t long /dev/ada0 and post the results here for review and advice.

Running now. Is it OK to have a large file transfer running while I run the smartctl command? I am refreshing a backup just in case.

 

[Redcoat]

Running now. Is it OK to have a large file transfer running while I run the smartctl command? I am refreshing a backup just in case.

Yes, no problem.

 

[geronimo1958]

Yes, no problem.

Will the results just appear on the screen or saved into a file?

 

[Redcoat]

No, you have to go in and get them.
In order to copy/paste easily, I suggest you ssh in - then run

Code:

smartctl -a /dev/ada0

and you'll be able to copy and paste the output in code tags here.

 

[geronimo1958]

root@FREENAS:~ # smartctl -a /dev/ada0
smartctl 7.0 2018-12-30 r4883 [FreeBSD 11.3-RELEASE-p14 amd64] (local build)
Copyright (C) 2002-18, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family: Western Digital Red
Device Model: WDC WD20EFRX-68EUZN0
Serial Number: WD-WCC4M1KAH2V6
LU WWN Device Id: 5 0014ee 2b638688c
Firmware Version: 82.00A82
User Capacity: 2,000,398,934,016 bytes [2.00 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: 3.0 Gb/s)
Local Time is: Wed Jun 2 09:16:50 2021 PDT
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: ( 115) The previous self-test completed having
the read element of the test failed.
Total time to complete Offline
data collection: (26760) 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: ( 270) 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 - 15
3 Spin_Up_Time 0x0027 175 172 021 Pre-fail Always - 4250
4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 141
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 046 046 000 Old_age Always - 39868
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 - 141
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 53
193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 286
194 Temperature_Celsius 0x0022 118 109 000 Old_age Always - 29
196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0
197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 1
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 - 1

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: read failure 30% 39856 2285904240
# 2 Extended offline Completed without error 00% 95 -

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.

 

[c77dk]

SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Extended offline Completed: read failure 30% 39856 2285904240

Unfortunately only one thing to do: replace the drive.

 

[Redcoat]

Well, 12 hours before this last test an extended test failed at 30% complete because of a read failure. Line 197 shows 1 current pending sector, line 200 shows an Error Rate of 1.

Time to replace this drive I would say. Your raidZ2 is keeping your pool alive right now.

 

[geronimo1958]

Why does FreeNAS say my pool is Healthy?
And for further info the CMR drives are preferable over the SMR?

 

[c77dk]

Why does FreeNAS say my pool is Healthy?

FreeNAS hasn't written any data to the part of the disk and as such haven't seen the damage.
The notice you got was from SMART

And for further info the CMR drives are preferable over the SMR?

That's a BIG yes - SMR has nothing to do in a NAS (mine was replaced by WD because of them messing up)

 

[geronimo1958]

FreeNAS hasn't written any data to the part of the disk and as such haven't seen the damage.
The notice you got was from SMART

That's a BIG yes - SMR has nothing to do in a NAS (mine was replaced by WD because of them messing up)

OK. Thanks. New disk on order. I think the one that failed is a Western Digital. The failed drive is about 8 years old. Trying to decide on whether or not to go with a 4TB.

 

[c77dk]

8 years - then it has done it's duty

 

[geronimo1958]

8 years - then it has done it's duty

Two of the others are also that same vintage. I did not get an email from FreeNAS when the error occurred. Just the red alert on the dashboard. Guess I need to investigate running more diagnostics and fix my email issues.

 

[c77dk]

Two of the others are also that same vintage. I did not get an email from FreeNAS when the error occurred. Just the red alert on the dashboard. Guess I need to investigate running more diagnostics and fix my email issues.

A suggestion would be to run scheduled SMART tests - for me it gives a little piece of mind knowing the disks are tested on a fixed schedule. Doing short tests on a daily basis and long once a month.

 

[geronimo1958]

A suggestion would be to run scheduled SMART tests - for me it gives a little piece of mind knowing the disks are tested on a fixed schedule. Doing short tests on a daily basis and long once a month.

And those test involve setting up scripts?

 

[danb35]

And once you do replace the disk, set up regular SMART tests to monitor the disks' condition.

 

[danb35]

And those test involve setting up scripts?

No, you configure them through the GUI. No scripts needed.

 

[geronimo1958]

No, you configure them through the GUI. No scripts needed.

OK. I will look into it. Don't want my data going kaput.

 

[danb35]

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