Critical volume error. Device has experienced an unrecoverable error. Everything shows healthy?

willrun4fun · Sep 17, 2018

Sept. 16, 2018, 2:16 p.m. - The volume vol1 state is ONLINE: One or more devices has experienced an unrecoverable error. An attempt was made to correct the error. Applications are unaffected.

If I go to the disks tab all disks are healthy and everything is up and running fine. Where do I look? I have a debug log if this is the place to post it.

Redcoat · Sep 17, 2018

From https://forums.freenas.org/index.ph...ced-an-unrecoverable-error.69236/#post-475899

SSH into the machine or open a shell and type zpool status -v

Post the result inside [CODE] [/CODE] tags for formatting. Look for errors in the READ/WRITE/CKSUM columns on each drive, check the line that talks about a scan/scrub.

Search is you friend.

willrun4fun · Sep 17, 2018

Code:

pool: freenas-boot
 state: ONLINE
  scan: scrub repaired 0 in 0 days 00:09:14 with 0 errors on Sat Sep 15 03:54:14 2018
config:

		NAME											STATE	 READ WRITE CKSUM
		freenas-boot									ONLINE	   0	 0	 0
		  mirror-0									  ONLINE	   0	 0	 0
			gptid/97aecbbf-53af-11e6-9207-0cc47aacb640  ONLINE	   0	 0	 0
			gptid/0e23252f-5371-11e6-93ee-0cc47aacb640  ONLINE	   0	 0	 0

errors: No known data errors

  pool: vol1
 state: ONLINE
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: http://illumos.org/msg/ZFS-8000-9P
  scan: resilvered 29.3M in 0 days 00:00:15 with 0 errors on Sun Sep 16 14:17:16 2018
config:

		NAME											STATE	 READ WRITE CKSUM
		vol1											ONLINE	   0	 0	 0
		  raidz2-0									  ONLINE	   0	 0	 0
			gptid/a184af89-5424-11e6-ad63-0cc47aacb640  ONLINE	 529   720	 0
			gptid/a235d65f-5424-11e6-ad63-0cc47aacb640  ONLINE	   0	 0	 0
			gptid/a2e3f441-5424-11e6-ad63-0cc47aacb640  ONLINE	   0	 0	 0
			gptid/a38f99bc-5424-11e6-ad63-0cc47aacb640  ONLINE	   0	 0	 0
			gptid/a4436390-5424-11e6-ad63-0cc47aacb640  ONLINE	   0	 0	 0
			gptid/376e60c3-a51d-11e6-9d7b-0cc47aacb640  ONLINE	   0	 0	 0
			gptid/a5b42fe3-5424-11e6-ad63-0cc47aacb640  ONLINE	   0	 0	 0
			gptid/a664a78f-5424-11e6-ad63-0cc47aacb640  ONLINE	   0	 0	 0

errors: No known data errors

Redcoat · Sep 17, 2018

OK! So now use the techniques here to identify the drive that is suffering read/write errors.

I guess the first thing I would do is run SMART test on it to see what it reports.

Potentially reseat the cables on it and repeat the scrub.

Chris Moore · Sep 17, 2018

Are you running any monitoring scripts to keep an eye on the health of your system?

Github repository for FreeNAS scripts, including disk burnin
https://forums.freenas.org/index.ph...for-freenas-scripts-including-disk-burnin.28/

You also might want to look at this:

Hard Drive Troubleshooting Guide (All Versions of FreeNAS)
https://forums.freenas.org/index.ph...bleshooting-guide-all-versions-of-freenas.17/

I also find this one handy:

Utility: disklist.pl, for listing partition, gptid, slot, devices, disktype, serial num, & multipath
https://forums.freenas.org/index.ph...ktype-serial-num-multipath.59319/#post-421424

Chris Moore · Sep 17, 2018

PS. Definitely SSH into the system and run the command smartctl -a /dev/<device name> against the drive that is throwing the errors. It might be good to look at the others also. Then post it up here for us to look at too, if you don't mind.

The output should look something like this:

Code:

root@Emily-NAS:~ # smartctl -a /dev/da19
smartctl 6.6 2017-11-05 r4594 [FreeBSD 11.1-STABLE amd64] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:	 Western Digital Gold
Device Model:	 WDC WD6002FRYZ-01WD5B0
Serial Number:	xxxxxxxxx
LU WWN Device Id: 5 000cca 255e90634
Firmware Version: 01.01M02
User Capacity:	6,001,175,126,016 bytes [6.00 TB]
Sector Sizes:	 512 bytes logical, 4096 bytes physical
Rotation Rate:	7200 rpm
Form Factor:	  3.5 inches
Device is:		In smartctl database [for details use: -P show]
ATA Version is:   ACS-2, ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:	Sun Sep 16 15:03:43 2018 CDT
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:  (0x82) Offline data collection activity
										was completed without error.
										Auto Offline Data Collection: Enabled.
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:				(  113) seconds.
Offline data collection
capabilities:					(0x5b) SMART execute Offline immediate.
										Auto Offline data collection on/off support.
										Suspend Offline collection upon new
										command.
										Offline surface scan supported.
										Self-test supported.
										No 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:		( 769) minutes.
SCT capabilities:			  (0x003d) 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	 0x000b   100   100   016	Pre-fail  Always	   -	   0
  2 Throughput_Performance  0x0005   138   138   054	Pre-fail  Offline	  -	   100
  3 Spin_Up_Time			0x0007   100   100   024	Pre-fail  Always	   -	   0
  4 Start_Stop_Count		0x0012   100   100   000	Old_age   Always	   -	   3
  5 Reallocated_Sector_Ct   0x0033   100   100   005	Pre-fail  Always	   -	   0
  7 Seek_Error_Rate		 0x000b   100   100   067	Pre-fail  Always	   -	   0
  8 Seek_Time_Performance   0x0005   140   140   020	Pre-fail  Offline	  -	   15
  9 Power_On_Hours		  0x0012   100   100   000	Old_age   Always	   -	   1399
 10 Spin_Retry_Count		0x0013   100   100   060	Pre-fail  Always	   -	   0
 12 Power_Cycle_Count	   0x0032   100   100   000	Old_age   Always	   -	   3
192 Power-Off_Retract_Count 0x0032   099   099   000	Old_age   Always	   -	   1747
193 Load_Cycle_Count		0x0012   099   099   000	Old_age   Always	   -	   1747
194 Temperature_Celsius	 0x0002   157   157   000	Old_age   Always	   -	   38 (Min/Max 25/50)
196 Reallocated_Event_Count 0x0032   100   100   000	Old_age   Always	   -	   0
197 Current_Pending_Sector  0x0022   100   100   000	Old_age   Always	   -	   0
198 Offline_Uncorrectable   0x0008   100   100   000	Old_age   Offline	  -	   0
199 UDMA_CRC_Error_Count	0x000a   200   200   000	Old_age   Always	   -	   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%	  1385		 -
# 2  Short offline	   Completed without error	   00%	  1361		 -
# 3  Extended offline	Completed without error	   00%	  1333		 -
# 4  Short offline	   Completed without error	   00%	  1313		 -
# 5  Extended offline	Completed without error	   00%	  1285		 -
# 6  Short offline	   Completed without error	   00%	  1265		 -
# 7  Short offline	   Completed without error	   00%	  1241		 -
# 8  Short offline	   Completed without error	   00%	  1217		 -
# 9  Short offline	   Completed without error	   00%	  1192		 -
#10  Extended offline	Completed without error	   00%	  1165		 -
#11  Short offline	   Completed without error	   00%	  1144		 -
#12  Extended offline	Completed without error	   00%	  1117		 -
#13  Short offline	   Completed without error	   00%	  1096		 -
#14  Short offline	   Completed without error	   00%	  1072		 -
#15  Short offline	   Completed without error	   00%	  1048		 -
#16  Short offline	   Completed without error	   00%	  1024		 -
#17  Extended offline	Completed without error	   00%	   997		 -
#18  Short offline	   Completed without error	   00%	   976		 -
#19  Extended offline	Completed without error	   00%	   949		 -
#20  Short offline	   Completed without error	   00%	   928		 -
#21  Short offline	   Completed without error	   00%	   904		 -

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.

root@Emily-NAS:~ #

willrun4fun · Sep 17, 2018

Code:

smartctl 6.6 2017-11-05 r4594 [FreeBSD 11.1-STABLE amd64] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:	 Western Digital Red
Device Model:	 WDC WD40EFRX-68WT0N0
Serial Number:	WD-WCC4E7XS0HXJ
LU WWN Device Id: 5 0014ee 20d3cbebb
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
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:	Mon Sep 17 13:26:08 2018 CDT
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:	  ( 121) The previous self-test completed having
										the read element of the test failed.
Total time to complete Offline 
data collection:				(52560) 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:		( 526) 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	   -	   70
  3 Spin_Up_Time			0x0027   100   253   021	Pre-fail  Always	   -	   0
  4 Start_Stop_Count		0x0032   100   100   000	Old_age   Always	   -	   5
  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   075   075   000	Old_age   Always	   -	   18719
 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	   -	   5
192 Power-Off_Retract_Count 0x0032   200   200   000	Old_age   Always	   -	   3
193 Load_Cycle_Count		0x0032   200   200   000	Old_age   Always	   -	   452
194 Temperature_Celsius	 0x0022   123   110   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   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: read failure	   90%	 18715		 105226688
# 2  Extended offline	Aborted by host			   90%	 18715		 -
# 3  Short offline	   Completed: read failure	   90%	 18714		 105226688

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.

danb35 · Sep 17, 2018

You aren't running scheduled SMART self-tests (which you should, on all your disks), and the disk is failing the manually-initiated tests you've run. Sounds like it's dead, Jim.

willrun4fun · Sep 17, 2018

danb35 said:
You aren't running scheduled SMART self-tests (which you should, on all your disks), and the disk is failing the manually-initiated tests you've run. Sounds like it's dead, Jim.

I just noticed this. I do have smart set to run automatically but the service is failing. It gives me an error because it has been trying to run on my USB boot disks.

I've fixed that issue now by disabling smart for those drives and the service is now running.

Now shows in the GUI:
CRITICAL: Sept. 17, 2018, 1:56 p.m. - Device: /dev/da4 [SAT], 1 Currently unreadable (pending) sectors

So it appears it's time to get out my spare disk and do a resilver I guess?

danb35 · Sep 17, 2018

willrun4fun said:
So it appears it's time to get out my spare disk and do a reslilver I guess?

If the spare's been burned in, yes. Look into RMAing the old disk if it's still under warranty as well.

willrun4fun · Sep 17, 2018

danb35 said:
If the spare's been burned in, yes. Look into RMAing the old disk if it's still under warranty as well.

No burn in. Fresh in box. what should be my plan of attack?

I did grab that disk-burning.sh and used vi to put the script on my box.
Leave the volume as is and add this drive in and test first? I could also maybe setup a second test box I guess, but that is kind of a PITA.

danb35 · Sep 17, 2018

willrun4fun said:
what should be my plan of attack?

https://forums.freenas.org/index.php?resources/hard-drive-burn-in-testing.92/
https://www.familybrown.org/dokuwiki/doku.php?id=fester:hvalid_hdd

Chris Moore · Sep 17, 2018

willrun4fun said:
I did grab that disk-burning.sh and used vi to put the script on my box.
Leave the volume as is and add this drive in and test first? I could also maybe setup a second test box I guess, but that is kind of a PITA.

I normally do the burn-in with a separate system for safety sake, and do it when I first get the drive, so it is ready to go when needed. If you do it in your live system, just be really certain which drive you are running the burn-in script against. Also, be sure to use tmux, use of which is covered in the insturctions that @danb35 pointed you at, because it allows you to detach from a session and then resume it later so you don't need to keep your desktop up with the terminal window open to the session while bad blocks is running. It takes some time.

Chris Moore · Sep 17, 2018

danb35 said:
Look into RMAing the old disk if it's still under warranty as well.

@willrun4fun I put the power on hours into a calculator and it is just over two years, so it should still be in warranty.

willrun4fun · Sep 18, 2018

Chris Moore said:
@willrun4fun I put the power on hours into a calculator and it is just over two years, so it should still be in warranty.

Yep, was planning on calling WD on that.

I setup a test box since it only takes about 10 minutes to get a spare haswell box I had here ready to go. Most of the way through badblocks on the new drive this AM. I have a dentists appointment today so we will see how far I get.....

willrun4fun · Sep 21, 2018

All burned in. Installed in the main nas and resilver is done. All green again. Fixed the SMART test to properly run on all HDDs and I'm good now.

Thanks!

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