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One drive showing lots of errors in smartctl, but another drive marked degraded

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Godfiend

Cadet
Joined
Jul 19, 2016
Messages
4
I have a 6-drive setup on RAIDZ2, and when I got a critical alert yesterday I figured I could just find the broken drive and replace it. But I'm a bit confused because it looks like one drive disconnected and a different drive has a lot of errors. I'm not sure if I'm worrying too much about the errors, or if I have multiple failures immanent, or if I'm just reading this all wrong.

zpool status gives me this output:
Code:
pool: freenas-boot
 state: ONLINE
  scan: scrub repaired 0 in 0h0m with 0 errors on Sun Dec  3 03:45:26 2017
config:

		NAME										  STATE	 READ WRITE CKSUM
		freenas-boot								  ONLINE	   0	 0	 0
		  gptid/cdb7ef94-4e56-11e6-929f-0cc47acb9984  ONLINE	   0	 0	 0

errors: No known data errors

  pool: tank0
 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: http://illumos.org/msg/ZFS-8000-9P
  scan: scrub repaired 35.0M in 2h17m with 0 errors on Sun Dec  3 01:04:40 2017
config:

		NAME											STATE	 READ WRITE CKSUM
		tank0										   DEGRADED	 0	 0	 0
		  raidz2-0									  DEGRADED	 0	 0	 0
			gptid/769858e6-4e1c-11e6-bdfb-0cc47acb9984  ONLINE	   0	 0	 0
			gptid/77beff42-4e1c-11e6-bdfb-0cc47acb9984  ONLINE	   0	 0	 0
			gptid/78ddc39d-4e1c-11e6-bdfb-0cc47acb9984  ONLINE	   0	 0	 0
			gptid/7a024fac-4e1c-11e6-bdfb-0cc47acb9984  ONLINE	   0	 0	 0
			gptid/7b26d0a9-4e1c-11e6-bdfb-0cc47acb9984  ONLINE	   0	 0	 0
			gptid/7c52a93a-4e1c-11e6-bdfb-0cc47acb9984  DEGRADED	 0	 0 3.16K  too many errors

errors: No known data errors


7c52a93a is my ada3 drive:
Code:
$glabel status
									  Name  Status  Components
gptid/cda8d6d1-4e56-11e6-929f-0cc47acb9984	 N/A  da0p1
gptid/cdb7ef94-4e56-11e6-929f-0cc47acb9984	 N/A  da0p2
gptid/78ddc39d-4e1c-11e6-bdfb-0cc47acb9984	 N/A  ada0p2
gptid/7a024fac-4e1c-11e6-bdfb-0cc47acb9984	 N/A  ada1p2
gptid/7b26d0a9-4e1c-11e6-bdfb-0cc47acb9984	 N/A  ada2p2
gptid/7c52a93a-4e1c-11e6-bdfb-0cc47acb9984	 N/A  ada3p2
gptid/769858e6-4e1c-11e6-bdfb-0cc47acb9984	 N/A  ada4p2
gptid/77beff42-4e1c-11e6-bdfb-0cc47acb9984	 N/A  ada5p2

And this is the drive that was disconnected when I first started looking at the system after the critical alert. I rebooted and it showed back up. But at first, I thought ada4 was the drive with the error - I didn't notice 3 was missing at first. So I ran a long test on 4 and It's showing a few errors.

As I understand it, this is the relevant section for ada3:
Code:
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   205   205   021	Pre-fail  Always	   -	   6716
  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   091   091   000	Old_age   Always	   -	   7253
 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	   -	   1
193 Load_Cycle_Count		0x0032   200   200   000	Old_age   Always	   -	   31
194 Temperature_Celsius	 0x0022   116   112   000	Old_age   Always	   -	   36
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	   -	   0
200 Multi_Zone_Error_Rate   0x0008   200   197   000	Old_age   Offline	  -	   6


And this is the relevant section for ada4:
Code:
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   102   101   051	Pre-fail  Always	   -	   8370
  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   165   165   140	Pre-fail  Always	   -	   1050
  7 Seek_Error_Rate		 0x002e   200   200   000	Old_age   Always	   -	   0
  9 Power_On_Hours		  0x0032   092   092   000	Old_age   Always	   -	   6060
 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	   -	   1
193 Load_Cycle_Count		0x0032   200   200   000	Old_age   Always	   -	   33
194 Temperature_Celsius	 0x0022   115   111   000	Old_age   Always	   -	   37
196 Reallocated_Event_Count 0x0032   087   087   000	Old_age   Always	   -	   113
197 Current_Pending_Sector  0x0032   200   200   000	Old_age   Always	   -	   30
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	  -	   3

When I do smartctl -a /dev/ada4, I also see an actual error log talking about register values and a command called "READ DMA" that eventually caused that error, but I'm not sure what to make of this. The entire self-test log for ada4 has Completed: read failure as the Status, while ada3 only has read failures on extended tests.

Please let me know what additional information I can provide - there's a lot of output here and I'm having a hard time figuring out what is relevant.
 

Jailer

Not strong, but bad
Joined
Sep 12, 2014
Messages
4,746
Don't truncate the output when posting. It helps to have all the information on your drives when trying to troublehoot.

Are you running regular Smart tests on your drives?
 

Godfiend

Cadet
Joined
Jul 19, 2016
Messages
4
I am running regular long & short tests. When I double checked this, I noticed that ada3 is not currently in the selection to be tested, probably because it was removed and re-added. Trying to add it to the drives to be tested via the GUI says "an error occurred".

Here is the full output of smartctl -a /dev/ada3:
Code:
sudo smartctl -a /dev/ada3
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:	 Western Digital Red
Device Model:	 WDC WD40EFRX-68WT0N0
Serial Number:	WD-WCC4E7HP6SDC
LU WWN Device Id: 5 0014ee 20d05b6f4
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:	Sun Dec  3 07:01:50 2017 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:				(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	   -	   0
  3 Spin_Up_Time			0x0027   205   205   021	Pre-fail  Always	   -	   6716
  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   091   091   000	Old_age   Always	   -	   7253
 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	   -	   1
193 Load_Cycle_Count		0x0032   200   200   000	Old_age   Always	   -	   31
194 Temperature_Celsius	 0x0022   116   112   000	Old_age   Always	   -	   36
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	   -	   0
200 Multi_Zone_Error_Rate   0x0008   200   197   000	Old_age   Offline	  -	   6

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%	  7244		 -
# 2  Extended offline	Completed: read failure	   80%	  7226		 1503972032
# 3  Short offline	   Completed without error	   00%	  7202		 -
# 4  Short offline	   Completed without error	   00%	  7082		 -
# 5  Short offline	   Completed without error	   00%	  6962		 -
# 6  Extended offline	Completed: read failure	   80%	  6842		 1503972032
# 7  Short offline	   Completed without error	   00%	  6722		 -
# 8  Short offline	   Completed without error	   00%	  6602		 -
# 9  Extended offline	Completed: read failure	   80%	  6506		 1503972032
#10  Short offline	   Completed without error	   00%	  6481		 -
#11  Short offline	   Completed without error	   00%	  6458		 -
#12  Short offline	   Completed without error	   00%	  6338		 -
#13  Short offline	   Completed without error	   00%	  6218		 -
#14  Extended offline	Completed: read failure	   80%	  6098		 1503972032
#15  Short offline	   Completed without error	   00%	  5978		 -
#16  Short offline	   Completed without error	   00%	  5858		 -
#17  Extended offline	Completed: read failure	   80%	  5763		 1503961872
#18  Short offline	   Completed without error	   00%	  5738		 -
#19  Short offline	   Completed without error	   00%	  5618		 -
#20  Short offline	   Completed without error	   00%	  5498		 -
#21  Extended offline	Completed: read failure	   80%	  5379		 1503955280

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.


Here is the full output of smartctl -a /dev/ada4:
Code:
sudo smartctl -a /dev/ada4
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:	 Western Digital Red
Device Model:	 WDC WD40EFRX-68WT0N0
Serial Number:	WD-WCC4E4ZRU00P
LU WWN Device Id: 5 0014ee 2b7d4edec
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:	Sun Dec  3 07:03:23 2017 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:	  ( 121) The previous self-test completed having
										the read element of the test failed.
Total time to complete Offline
data collection:				(54240) 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:		( 542) 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   102   101   051	Pre-fail  Always	   -	   8370
  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   165   165   140	Pre-fail  Always	   -	   1050
  7 Seek_Error_Rate		 0x002e   200   200   000	Old_age   Always	   -	   0
  9 Power_On_Hours		  0x0032   092   092   000	Old_age   Always	   -	   6060
 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	   -	   1
193 Load_Cycle_Count		0x0032   200   200   000	Old_age   Always	   -	   33
194 Temperature_Celsius	 0x0022   115   111   000	Old_age   Always	   -	   37
196 Reallocated_Event_Count 0x0032   087   087   000	Old_age   Always	   -	   113
197 Current_Pending_Sector  0x0032   200   200   000	Old_age   Always	   -	   30
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	  -	   3

SMART Error Log Version: 1
ATA Error Count: 1399 (device log contains only the most recent five errors)
		CR = Command Register [HEX]
		FR = Features Register [HEX]
		SC = Sector Count Register [HEX]
		SN = Sector Number Register [HEX]
		CL = Cylinder Low Register [HEX]
		CH = Cylinder High Register [HEX]
		DH = Device/Head Register [HEX]
		DC = Device Command Register [HEX]
		ER = Error register [HEX]
		ST = Status register [HEX]
Powered_Up_Time is measured from power on, and printed as
DDd+hh:mm:SS.sss where DD=days, hh=hours, mm=minutes,
SS=sec, and sss=millisec. It "wraps" after 49.710 days.

Error 1399 occurred at disk power-on lifetime: 6053 hours (252 days + 5 hours)
  When the command that caused the error occurred, the device was active or idle.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 51 00 c8 ef a0 45  Error: UNC at LBA = 0x05a0efc8 = 94433224

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  c8 00 00 b8 ef a0 45 08  46d+22:40:15.825  READ DMA
  c8 00 00 b8 ef a0 45 08  46d+22:40:10.608  READ DMA
  c8 00 00 b8 ef a0 45 08  46d+22:40:05.169  READ DMA
  c8 00 00 b8 ef a0 45 08  46d+22:40:01.439  READ DMA
  c8 00 00 b8 ef a0 45 08  46d+22:39:57.793  READ DMA

Error 1398 occurred at disk power-on lifetime: 6053 hours (252 days + 5 hours)
  When the command that caused the error occurred, the device was active or idle.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 51 00 c8 ef a0 45  Error: UNC at LBA = 0x05a0efc8 = 94433224

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  c8 00 00 b8 ef a0 45 08  46d+22:40:10.608  READ DMA
  c8 00 00 b8 ef a0 45 08  46d+22:40:05.169  READ DMA
  c8 00 00 b8 ef a0 45 08  46d+22:40:01.439  READ DMA
  c8 00 00 b8 ef a0 45 08  46d+22:39:57.793  READ DMA

Error 1397 occurred at disk power-on lifetime: 6053 hours (252 days + 5 hours)
  When the command that caused the error occurred, the device was active or idle.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 51 00 c8 ef a0 45  Error: UNC at LBA = 0x05a0efc8 = 94433224

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  c8 00 00 b8 ef a0 45 08  46d+22:40:05.169  READ DMA
  c8 00 00 b8 ef a0 45 08  46d+22:40:01.439  READ DMA
  c8 00 00 b8 ef a0 45 08  46d+22:39:57.793  READ DMA

Error 1396 occurred at disk power-on lifetime: 6053 hours (252 days + 5 hours)
  When the command that caused the error occurred, the device was active or idle.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 51 00 c8 ef a0 45  Error: UNC at LBA = 0x05a0efc8 = 94433224

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  c8 00 00 b8 ef a0 45 08  46d+22:40:01.439  READ DMA
  c8 00 00 b8 ef a0 45 08  46d+22:39:57.793  READ DMA

Error 1395 occurred at disk power-on lifetime: 6053 hours (252 days + 5 hours)
  When the command that caused the error occurred, the device was active or idle.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 51 00 c8 ef a0 45  Error: UNC at LBA = 0x05a0efc8 = 94433224

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  c8 00 00 b8 ef a0 45 08  46d+22:39:57.793  READ DMA

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	   90%	  6041		 94329520
# 2  Extended offline	Completed: read failure	   90%	  6032		 94329520
# 3  Short offline	   Completed: read failure	   90%	  6009		 94329520
# 4  Short offline	   Completed: read failure	   90%	  5889		 94329520
# 5  Short offline	   Completed: read failure	   90%	  5769		 94329520
# 6  Short offline	   Completed: read failure	   90%	  5649		 94329520
# 7  Extended offline	Completed: read failure	   90%	  5648		 94329520
# 8  Short offline	   Completed: read failure	   90%	  5529		 94329520
# 9  Short offline	   Completed: read failure	   90%	  5410		 94329520
#10  Extended offline	Completed: read failure	   90%	  5312		 94329520
#11  Short offline	   Completed: read failure	   90%	  5289		 94329520
#12  Short offline	   Completed: read failure	   90%	  5265		 94329656
#13  Short offline	   Completed: read failure	   90%	  5145		 94329656
#14  Short offline	   Completed: read failure	   90%	  5025		 94329656
#15  Short offline	   Completed: read failure	   90%	  4905		 94329656
#16  Extended offline	Completed: read failure	   90%	  4904		 94329657
#17  Short offline	   Completed: read failure	   90%	  4785		 94329656
#18  Short offline	   Completed: read failure	   90%	  4665		 94329656
#19  Extended offline	Completed: read failure	   90%	  5761		 94329656
#20  Short offline	   Completed: read failure	   90%	  5738		 94329656
#21  Short offline	   Completed: read failure	   90%	  5618		 94329656

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.
 

Jailer

Not strong, but bad
Joined
Sep 12, 2014
Messages
4,746
I would replace both of those drives, they are both failing SMART tests.
 

Godfiend

Cadet
Joined
Jul 19, 2016
Messages
4
Ok, I was actually already thinking that'd be the case. Do I need to replace them one at a time?
 

Jailer

Not strong, but bad
Joined
Sep 12, 2014
Messages
4,746
Yes, one at a time and wait for it to finish resilvering before attempting to replace the next.
 
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