Require help interpreting SMART results

anon27075190 · March 15, 2021, 10:32pm

I require help interpreting SMART results. I knew in advance the disk was not perfectly fine so I ran an extended selftest. I am unfortunately unable to determine if the disk would still be fine to use for a ZFS pool.

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Red
Device Model:     WDC WD40EFRX-68WT0N0
Serial Number:    WD-WDD4E5EN7892
LU WWN Device Id: 5 0014ee 261de13e5
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: 3.0 Gb/s)
Local Time is:    Mon Mar 15 20:23:21 2021 UTC
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: 		(53520) 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: 	 ( 535) 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       -       1560
  3 Spin_Up_Time            0x0027   203   171   021    Pre-fail  Always       -       6841
  4 Start_Stop_Count        0x0032   095   095   000    Old_age   Always       -       5015
  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x002e   200   199   000    Old_age   Always       -       0
  9 Power_On_Hours          0x0032   085   085   000    Old_age   Always       -       11050
 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   096   096   000    Old_age   Always       -       4805
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       146
193 Load_Cycle_Count        0x0032   199   199   000    Old_age   Always       -       4909
194 Temperature_Celsius     0x0022   119   108   000    Old_age   Always       -       33
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   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  Extended offline    Completed: read failure       90%     11020         130281
# 2  Extended offline    Completed: read failure       90%     10979         130280
# 3  Short offline       Completed without error       00%      7678         -
# 4  Short offline       Completed without error       00%      6261         -
# 5  Short offline       Completed without error       00%      5542         -
# 6  Short offline       Completed without error       00%      4612         -
# 7  Short offline       Completed without error       00%      4273         -
# 8  Short offline       Completed without error       00%      3476         -
# 9  Short offline       Completed without error       00%      3268         -
#10  Short offline       Completed without error       00%      3089         -
#11  Short offline       Completed without error       00%      3005         -
#12  Short offline       Completed without error       00%      2827         -
#13  Short offline       Completed without error       00%      2655         -
#14  Short offline       Completed without error       00%      2420         -
#15  Short offline       Completed without error       00%      2274         -
#16  Short offline       Completed without error       00%      2008         -
#17  Short offline       Completed without error       00%      1749         -
#18  Short offline       Completed without error       00%      1328         -
#19  Short offline       Completed without error       00%      1108         -
#20  Short offline       Completed without error       00%       995         -
#21  Short offline       Completed without error       00%       776         -

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.

Thank you!

Big_Al_Tech · March 15, 2021, 10:54pm

Unless someone see’s something different, the drive appears to be okay for use. Has over a year of use time, which imo is still perfectly fine.

zlynx · March 15, 2021, 10:57pm

You’ve had some read failures. That doesn’t mean the drive is dead. It does mean you may have lost some data. If the drive is empty you could run the Linux badblocks program on it with a read/write test. After running the test then try the SMART self-test again.

Or just try writing zeros to the whole drive.

The point is that if the read failures are from a weak signal on disk then rewriting it may make those blocks good again. Or if they are physically bad somehow the drive can relocate them to spares.

The drive is in real trouble if it cannot write to those bad read blocks or if read failures increase constantly or if relocated blocks increase constantly. If that happens the drive is probably toast. It could have had a head crash or something which damaged several tracks or the head.

Dutch_Master · March 15, 2021, 10:57pm

Absolutely. I have drives in use of the same capacity, with power_on time of 60+k hrs, still totally fine.

anon27075190 · March 16, 2021, 10:01am

Thank you for this answer. The reported read failures were what worried me. I will run badblocks and the smart test again and report here how it turned out.

anon27075190 · March 19, 2021, 6:54pm

Badblocks reported:

Pass completed, 1122 bad blocks found. (27/0/1095 errors)

SMART failed with:

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%     11139         9716488

This looks bad, right?

Dutch_Master · March 19, 2021, 8:22pm

I believe WD Red drives have a 3 yr warranty. It seems you have this drive for less then 2 years, so request an RMA for the drive.

anon27075190 · March 19, 2021, 8:50pm

It is out of warranty for a couple years already. The listed life time seems to be the time it was turned on.

system · December 18, 2021, 2:50pm

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