What is wrong here?

[ObiTobi]

Hi,

today I received a alert from my NAS because a one Disk has errors. But why is the disk online and I can't see more informations about this errors.
Volume (zpool) has status - healthy and all drives are online


Is the hard drive broken or not?

What happens if I try to set the drive offline and then online again?

 

[Redcoat]

Those are SMART messages from a drive that has problems. Run short and long SMART tests on ada2 following the method described in @joeschmuck's guide found here: https://forums.freenas.org/index.php?resources/hard-drive-troubleshooting-guide-all-versions-of-freenas.17/ and post the results here in Code Tags
https://forums.freenas.org/index.ph...bleshooting-guide-all-versions-of-freenas.17/
One or more of the experienced SMART test readers will be able to comment for you.

 

[ObiTobi]

short test

Code:

 smartctl -a /dev/ada2
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:	 Seagate Desktop HDD.15
Device Model:	 ST4000DM000-1F2168
Serial Number:	W3007KG8
LU WWN Device Id: 5 000c50 060831c72
Firmware Version: CC52
User Capacity:	4,000,787,030,016 bytes [4.00 TB]
Sector Sizes:	 512 bytes logical, 4096 bytes physical
Rotation Rate:	5900 rpm
Form Factor:	  3.5 inches
Device is:		In smartctl database [for details use: -P show]
ATA Version is:   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:	Fri Dec 15 12:03:49 2017 CET
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:	  ( 249) Self-test routine in progress...
										90% of test remaining.
Total time to complete Offline
data collection:				(  612) 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:		( 541) minutes.
Conveyance self-test routine
recommended polling time:		(   2) minutes.
SCT capabilities:			  (0x1085) SCT Status supported.

SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME		  FLAG	 VALUE WORST THRESH TYPE	  UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate	 0x000f   116   099   006	Pre-fail  Always	   -	   108804784
  3 Spin_Up_Time			0x0003   091   091   000	Pre-fail  Always	   -	   0
  4 Start_Stop_Count		0x0032   099   099   020	Old_age   Always	   -	   1102
  5 Reallocated_Sector_Ct   0x0033   100   100   010	Pre-fail  Always	   -	   0
  7 Seek_Error_Rate		 0x000f   087   060   030	Pre-fail  Always	   -	   474896086
  9 Power_On_Hours		  0x0032   061   061   000	Old_age   Always	   -	   34551
 10 Spin_Retry_Count		0x0013   100   100   097	Pre-fail  Always	   -	   0
 12 Power_Cycle_Count	   0x0032   100   100   020	Old_age   Always	   -	   660
183 Runtime_Bad_Block	   0x0032   100   100   000	Old_age   Always	   -	   0
184 End-to-End_Error		0x0032   100   100   099	Old_age   Always	   -	   0
187 Reported_Uncorrect	  0x0032   100   100   000	Old_age   Always	   -	   0
188 Command_Timeout		 0x0032   100   099   000	Old_age   Always	   -	   0 0 3
189 High_Fly_Writes		 0x003a   094   094   000	Old_age   Always	   -	   6
190 Airflow_Temperature_Cel 0x0022   069   048   045	Old_age   Always	   -	   31 (0 14 31 29 0)
191 G-Sense_Error_Rate	  0x0032   100   100   000	Old_age   Always	   -	   0
192 Power-Off_Retract_Count 0x0032   100   100   000	Old_age   Always	   -	   237
193 Load_Cycle_Count		0x0032   099   099   000	Old_age   Always	   -	   2388
194 Temperature_Celsius	 0x0022   031   052   000	Old_age   Always	   -	   31 (128 0 0 0 0)
197 Current_Pending_Sector  0x0012   100   100   000	Old_age   Always	   -	   8
198 Offline_Uncorrectable   0x0010   100   100   000	Old_age   Offline	  -	   8
199 UDMA_CRC_Error_Count	0x003e   200   200   000	Old_age   Always	   -	   0
240 Head_Flying_Hours	   0x0000   100   253   000	Old_age   Offline	  -	   34548h+16m+15.502s
241 Total_LBAs_Written	  0x0000   100   253   000	Old_age   Offline	  -	   65280357132
242 Total_LBAs_Read		 0x0000   100   253   000	Old_age   Offline	  -	   181205160573

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	Self-test routine in progress 90%	 34551		 -
# 2  Extended offline	Completed without error	   00%	 27212		 -
# 3  Extended offline	Completed without error	   00%	 27165		 -
# 4  Extended offline	Completed without error	   00%	 26806		 -
# 5  Extended offline	Completed without error	   00%	 26472		 -
# 6  Extended offline	Completed without error	   00%	 26424		 -
# 7  Extended offline	Completed without error	   00%	 26076		 -
# 8  Extended offline	Completed without error	   00%	 25740		 -
# 9  Extended offline	Completed without error	   00%	 25716		 -
#10  Extended offline	Completed without error	   00%	 25356		 -
#11  Extended offline	Completed without error	   00%	 25021		 -
#12  Extended offline	Interrupted (host reset)	  00%	 24968		 -
#13  Extended offline	Completed without error	   00%	 24614		 -
#14  Extended offline	Completed without error	   00%	 24280		 -

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]

Look at 197 and 198 and read @joeschmuck's guide on the meaning and relevance of non-zero values for them (you have 8 for both).

 

[ObiTobi]

Yes new hard drive is already ordered

 

[joeschmuck]

Basically as @Redcoat has pointed out, the values for ID 197 and 198 are telling you that you have a potiential failure occuring. The troubleshooting guide I created has my personal threshold values for considering replacement which is any value above 5. You could have 8 and be fine however if I had a value of 8, I'd be getting a replacement drive started. Since the SMART Extended test is only a read test it may not fail. When these specific sectors are written to again they may fail and then ID 5 will increment thus locking out the failing sector(s). I would not say that your hard drive has failed yet but it is definately on it's way. The rationale is that the platter surface starts to fail, think of it like a thin film on a sheet of glass and now that film is debonding from the glass and starts to flake off. It will get worse over time each time the heads fly over that area and the platers heat up and cool down. You have almost 4 years of life out of this Desktop drive, not bad at all. I'd plan to replace it in the very near future.

Also, setup routine SMART testing. I like a daily short test and weekly extended/long test. Looks like you were doing them and then for some reason stopped. It could have been a software update that caused the change, it's happened to a lot of us.