Hello!
I build my First FreeNas backup server, but i have problems wit HDD disks - SMART :(
Alert: Device: /dev/ada2, Read SMART Self-Test Log Failed
MB: SUPERMICRO X11SSL-F
CPU: Intel Pentium G4560 - 3.5 GHz
RAM: 2 x Kingston - DDR4 - 8 GB - DIMM 288-pin - 2400 MHz unbuffered - ECC
Storage HDD: 6 x WD NAS RED PRO - 2TB - 7200rpm
Boot USB: 2 x ADATA Superior Series S102 Pro - USB flash drive - 16 GB - USB 3.0 - titanium blue
Pool - 6 x HDD - RAIDZ2
Sharing - NFS
When VMs backup starting after some time geting error:
	
		
			
		
		
	
		
		
	
	
	
		
			
		
		
	
Here is Smart log:
I`m not a spec. but looks like this problem is something with this type of HDD:
WD NAS RED PRO - 2TB - 7200rpm
Device Model: WDC WD2002FFSX-68PF8N0
Firmware Version: 81.00A81
	
		
			
		
		
	
			
			I build my First FreeNas backup server, but i have problems wit HDD disks - SMART :(
Alert: Device: /dev/ada2, Read SMART Self-Test Log Failed
MB: SUPERMICRO X11SSL-F
CPU: Intel Pentium G4560 - 3.5 GHz
RAM: 2 x Kingston - DDR4 - 8 GB - DIMM 288-pin - 2400 MHz unbuffered - ECC
Storage HDD: 6 x WD NAS RED PRO - 2TB - 7200rpm
Boot USB: 2 x ADATA Superior Series S102 Pro - USB flash drive - 16 GB - USB 3.0 - titanium blue
Pool - 6 x HDD - RAIDZ2
Sharing - NFS
When VMs backup starting after some time geting error:
	
		
			
		
		
	
Here is Smart log:
Code:
smartctl 6.6 2017-11-05 r4594 [FreeBSD 11.2-STABLE amd64] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Red Pro
Device Model:     WDC WD2002FFSX-68PF8N0
Serial Number:    WD-WMC6N0M3XXXX
LU WWN Device Id: 5 0014ee 0048c3807
Firmware Version: 81.00A81
User Capacity:    2,000,398,934,016 bytes [2.00 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-3 T13/2161-D revision 5
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Mon Feb  4 06:07:15 2019 PST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
AAM feature is:   Unavailable
APM feature is:   Disabled
Rd look-ahead is: Enabled
Write cache is:   Enabled
DSN feature is:   Disabled
ATA Security is:  Disabled, NOT FROZEN [SEC1]
Wt Cache Reorder: 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:                (    0) 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:        ( 207) minutes.
Conveyance self-test routine
recommended polling time:        (   5) minutes.
SCT capabilities:              (0x203d) 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          FLAGS    VALUE WORST THRESH FAIL RAW_VALUE
  1 Raw_Read_Error_Rate     POSR-K   200   200   051    -    0
  3 Spin_Up_Time            POS--K   146   135   021    -    5683
  4 Start_Stop_Count        -O--CK   100   100   000    -    43
  5 Reallocated_Sector_Ct   PO--CK   200   200   140    -    0
  7 Seek_Error_Rate         -OSR-K   100   253   000    -    0
  9 Power_On_Hours          -O--CK   100   100   000    -    81
10 Spin_Retry_Count        -O--CK   100   253   000    -    0
11 Calibration_Retry_Count -O--CK   100   253   000    -    0
12 Power_Cycle_Count       -O--CK   100   100   000    -    43
16 Unknown_Attribute       -O---K   000   200   000    -    115317874
183 Runtime_Bad_Block       -O--CK   100   100   000    -    0
192 Power-Off_Retract_Count -O--CK   200   200   000    -    34
193 Load_Cycle_Count        -O--CK   200   200   000    -    8
194 Temperature_Celsius     -O---K   119   107   000    -    28
196 Reallocated_Event_Count -O--CK   200   200   000    -    0
197 Current_Pending_Sector  -O--CK   200   200   000    -    0
198 Offline_Uncorrectable   ----CK   100   253   000    -    0
199 UDMA_CRC_Error_Count    -O--CK   200   200   000    -    0
200 Multi_Zone_Error_Rate   ---R--   100   253   000    -    0
                            ||||||_ K auto-keep
                            |||||__ C event count
                            ||||___ R error rate
                            |||____ S speed/performance
                            ||_____ O updated online
                            |______ P prefailure warning
General Purpose Log Directory Version 1
SMART           Log Directory Version 1 [multi-sector log support]
Address    Access  R/W   Size  Description
0x00       GPL,SL  R/O      1  Log Directory
0x01           SL  R/O      1  Summary SMART error log
0x02           SL  R/O      5  Comprehensive SMART error log
0x03       GPL     R/O      6  Ext. Comprehensive SMART error log
0x04       GPL,SL  R/O      8  Device Statistics log
0x06           SL  R/O      1  SMART self-test log
0x07       GPL     R/O      1  Extended self-test log
0x08       GPL     R/O      2  Power Conditions log
0x09           SL  R/W      1  Selective self-test log
0x0a       GPL     R/W      8  Device Statistics Notification
0x0c       GPL     R/O    901  Pending Defects log
0x0d       GPL,SL  R/O      8  LPS Mis-alignment log
0x10       GPL     R/O      1  NCQ Command Error log
0x11       GPL     R/O      1  SATA Phy Event Counters log
0x13       GPL     R/O      1  SATA NCQ Send and Receive log
0x24       GPL     R/O    192  Current Device Internal Status Data log
0x30       GPL,SL  R/O      9  IDENTIFY DEVICE data log
0x80-0x9f  GPL,SL  R/W     16  Host vendor specific log
0xa0-0xb6  GPL,SL  VS      16  Device vendor specific log
0xb7       GPL,SL  VS      39  Device vendor specific log
0xc0       GPL,SL  VS       1  Device vendor specific log
0xe0       GPL,SL  R/W      1  SCT Command/Status
0xe1       GPL,SL  R/W      1  SCT Data Transfer
SMART Extended Comprehensive Error Log Version: 1 (6 sectors)
Device Error Count: 4736 (device log contains only the most recent 24 errors)
        CR     = Command Register
        FEATR  = Features Register
        COUNT  = Count (was: Sector Count) Register
        LBA_48 = Upper bytes of LBA High/Mid/Low Registers ]  ATA-8
        LH     = LBA High (was: Cylinder High) Register    ]   LBA
        LM     = LBA Mid (was: Cylinder Low) Register      ] Register
        LL     = LBA Low (was: Sector Number) Register     ]
        DV     = Device (was: Device/Head) Register
        DC     = Device Control Register
        ER     = Error register
        ST     = Status register
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 4736 [7] occurred at disk power-on lifetime: 80 hours (3 days + 8 hours)
  When the command that caused the error occurred, the device was in an unknown state.
  After command completion occurred, registers were:
  ER -- ST COUNT  LBA_48  LH LM LL DV DC
  -- -- -- == -- == == == -- -- -- -- --
  04 -- 51 00 00 00 00 00 00 00 00 00 00  Error: ABRT
  Commands leading to the command that caused the error were:
  CR FEATR COUNT  LBA_48  LH LM LL DV DC  Powered_Up_Time  Command/Feature_Name
  -- == -- == -- == == == -- -- -- -- --  ---------------  --------------------
Error 4735 [6] occurred at disk power-on lifetime: 80 hours (3 days + 8 hours)
  When the command that caused the error occurred, the device was in an unknown state.
  After command completion occurred, registers were:
  ER -- ST COUNT  LBA_48  LH LM LL DV DC
  -- -- -- == -- == == == -- -- -- -- --
  04 -- 51 00 00 00 00 00 00 00 00 00 00  Error: ABRT
  Commands leading to the command that caused the error were:
  CR FEATR COUNT  LBA_48  LH LM LL DV DC  Powered_Up_Time  Command/Feature_Name
  -- == -- == -- == == == -- -- -- -- --  ---------------  --------------------
Error 4734 [5] occurred at disk power-on lifetime: 80 hours (3 days + 8 hours)
  When the command that caused the error occurred, the device was in an unknown state.
  After command completion occurred, registers were:
  ER -- ST COUNT  LBA_48  LH LM LL DV DC
  -- -- -- == -- == == == -- -- -- -- --
  04 -- 51 00 00 00 00 00 00 00 00 00 00  Error: ABRT
  Commands leading to the command that caused the error were:
  CR FEATR COUNT  LBA_48  LH LM LL DV DC  Powered_Up_Time  Command/Feature_Name
  -- == -- == -- == == == -- -- -- -- --  ---------------  --------------------
Error 4733 [4] occurred at disk power-on lifetime: 80 hours (3 days + 8 hours)
  When the command that caused the error occurred, the device was in an unknown state.
  After command completion occurred, registers were:
  ER -- ST COUNT  LBA_48  LH LM LL DV DC
  -- -- -- == -- == == == -- -- -- -- --
  04 -- 51 00 00 00 00 00 00 00 00 00 00  Error: ABRT
  Commands leading to the command that caused the error were:
  CR FEATR COUNT  LBA_48  LH LM LL DV DC  Powered_Up_Time  Command/Feature_Name
  -- == -- == -- == == == -- -- -- -- --  ---------------  --------------------
Error 4732 [3] occurred at disk power-on lifetime: 80 hours (3 days + 8 hours)
  When the command that caused the error occurred, the device was active or idle.
  After command completion occurred, registers were:
  ER -- ST COUNT  LBA_48  LH LM LL DV DC
  -- -- -- == -- == == == -- -- -- -- --
  10 -- 41 00 40 00 00 0b 32 40 50 40 00  Error: IDNF at LBA = 0x0b324050 = 187842640
  Commands leading to the command that caused the error were:
  CR FEATR COUNT  LBA_48  LH LM LL DV DC  Powered_Up_Time  Command/Feature_Name
  -- == -- == -- == == == -- -- -- -- --  ---------------  --------------------
  61 00 40 00 a0 00 00 0b 32 40 50 40 00     01:37:01.386  WRITE FPDMA QUEUED
  61 00 40 00 98 00 00 0b 32 40 10 40 08     00:25:25.503  WRITE FPDMA QUEUED
  2f 00 00 00 01 00 00 00 00 00 10 00 08     00:25:25.503  READ LOG EXT
  61 00 40 00 40 00 00 0b 32 40 50 40 08     00:25:18.420  WRITE FPDMA QUEUED
  61 00 40 00 38 00 00 0b 32 40 10 40 08     00:25:18.420  WRITE FPDMA QUEUED
Error 4731 [2] occurred at disk power-on lifetime: 80 hours (3 days + 8 hours)
  When the command that caused the error occurred, the device was active or idle.
  After command completion occurred, registers were:
  ER -- ST COUNT  LBA_48  LH LM LL DV DC
  -- -- -- == -- == == == -- -- -- -- --
  10 -- 41 00 40 00 00 0b 32 40 10 40 00  Error: IDNF at LBA = 0x0b324010 = 187842576
  Commands leading to the command that caused the error were:
  CR FEATR COUNT  LBA_48  LH LM LL DV DC  Powered_Up_Time  Command/Feature_Name
  -- == -- == -- == == == -- -- -- -- --  ---------------  --------------------
  61 00 40 00 38 00 00 0b 32 40 10 40 00     01:36:54.310  WRITE FPDMA QUEUED
  61 00 40 00 30 00 00 0b 32 3f 50 40 08     00:25:18.420  WRITE FPDMA QUEUED
  2f 00 00 00 01 00 00 00 00 00 10 00 08     00:25:18.420  READ LOG EXT
  61 00 40 00 d0 00 00 0b 32 40 10 40 08     00:25:11.337  WRITE FPDMA QUEUED
  61 00 40 00 c8 00 00 0b 32 3f 50 40 08     00:25:11.337  WRITE FPDMA QUEUED
Error 4730 [1] occurred at disk power-on lifetime: 80 hours (3 days + 8 hours)
  When the command that caused the error occurred, the device was active or idle.
  After command completion occurred, registers were:
  ER -- ST COUNT  LBA_48  LH LM LL DV DC
  -- -- -- == -- == == == -- -- -- -- --
  10 -- 41 00 40 00 00 0b 32 3f 50 40 00  Error: IDNF at LBA = 0x0b323f50 = 187842384
  Commands leading to the command that caused the error were:
  CR FEATR COUNT  LBA_48  LH LM LL DV DC  Powered_Up_Time  Command/Feature_Name
  -- == -- == -- == == == -- -- -- -- --  ---------------  --------------------
  61 00 40 00 c8 00 00 0b 32 3f 50 40 00     01:36:47.233  WRITE FPDMA QUEUED
  61 00 40 00 c0 00 00 0b 32 3f d0 40 08     00:25:11.337  WRITE FPDMA QUEUED
  2f 00 00 00 01 00 00 00 00 00 10 00 08     00:25:11.337  READ LOG EXT
  61 00 40 00 58 00 00 0b 32 3f 50 40 08     00:25:04.253  WRITE FPDMA QUEUED
  61 00 40 00 50 00 00 0b 32 3f d0 40 08     00:25:04.253  WRITE FPDMA QUEUED
Error 4729 [0] occurred at disk power-on lifetime: 80 hours (3 days + 8 hours)
  When the command that caused the error occurred, the device was active or idle.
  After command completion occurred, registers were:
  ER -- ST COUNT  LBA_48  LH LM LL DV DC
  -- -- -- == -- == == == -- -- -- -- --
  10 -- 41 00 40 00 00 0b 32 3f d0 40 00  Error: IDNF at LBA = 0x0b323fd0 = 187842512
  Commands leading to the command that caused the error were:
  CR FEATR COUNT  LBA_48  LH LM LL DV DC  Powered_Up_Time  Command/Feature_Name
  -- == -- == -- == == == -- -- -- -- --  ---------------  --------------------
  61 00 40 00 50 00 00 0b 32 3f d0 40 00     01:36:40.158  WRITE FPDMA QUEUED
  61 00 40 00 48 00 00 0b 32 3f 90 40 08     00:25:04.253  WRITE FPDMA QUEUED
  2f 00 00 00 01 00 00 00 00 00 10 00 08     00:25:04.253  READ LOG EXT
  61 00 40 00 d8 00 00 0b 32 3f d0 40 08     00:24:57.170  WRITE FPDMA QUEUED
  61 00 40 00 d0 00 00 0b 32 3f 90 40 08     00:24:57.170  WRITE FPDMA QUEUED
SMART Extended Self-test Log Version: 1 (1 sectors)
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed without error       00%        79         -
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.
SCT Status Version:                  3
SCT Version (vendor specific):       258 (0x0102)
SCT Support Level:                   1
Device State:                        Active (0)
Current Temperature:                    28 Celsius
Power Cycle Min/Max Temperature:     27/28 Celsius
Lifetime    Min/Max Temperature:     22/40 Celsius
Under/Over Temperature Limit Count:   0/0
Vendor specific:
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
SCT Temperature History Version:     2
Temperature Sampling Period:         1 minute
Temperature Logging Interval:        1 minute
Min/Max recommended Temperature:      0/60 Celsius
Min/Max Temperature Limit:           -41/85 Celsius
Temperature History Size (Index):    478 (93)
Index    Estimated Time   Temperature Celsius
  94    2019-02-03 22:10    38  *******************
...    ..( 34 skipped).    ..  *******************
129    2019-02-03 22:45    38  *******************
130    2019-02-03 22:46     ?  -
131    2019-02-03 22:47    38  *******************
132    2019-02-03 22:48     ?  -
133    2019-02-03 22:49    38  *******************
...    ..( 25 skipped).    ..  *******************
159    2019-02-03 23:15    38  *******************
160    2019-02-03 23:16    39  ********************
...    ..( 47 skipped).    ..  ********************
208    2019-02-04 00:04    39  ********************
209    2019-02-04 00:05     ?  -
210    2019-02-04 00:06    22  ***
211    2019-02-04 00:07     ?  -
212    2019-02-04 00:08    25  ******
213    2019-02-04 00:09    25  ******
214    2019-02-04 00:10    25  ******
215    2019-02-04 00:11    26  *******
216    2019-02-04 00:12    27  ********
217    2019-02-04 00:13    27  ********
218    2019-02-04 00:14    28  *********
219    2019-02-04 00:15     ?  -
220    2019-02-04 00:16    29  **********
221    2019-02-04 00:17     ?  -
222    2019-02-04 00:18    29  **********
223    2019-02-04 00:19    29  **********
224    2019-02-04 00:20    29  **********
225    2019-02-04 00:21    30  ***********
226    2019-02-04 00:22     ?  -
227    2019-02-04 00:23    30  ***********
228    2019-02-04 00:24     ?  -
229    2019-02-04 00:25    30  ***********
230    2019-02-04 00:26     ?  -
231    2019-02-04 00:27    30  ***********
...    ..(  3 skipped).    ..  ***********
235    2019-02-04 00:31    30  ***********
236    2019-02-04 00:32    31  ************
237    2019-02-04 00:33    31  ************
238    2019-02-04 00:34    31  ************
239    2019-02-04 00:35    32  *************
...    ..(  2 skipped).    ..  *************
242    2019-02-04 00:38    32  *************
243    2019-02-04 00:39    33  **************
...    ..(  3 skipped).    ..  **************
247    2019-02-04 00:43    33  **************
248    2019-02-04 00:44    34  ***************
...    ..(  4 skipped).    ..  ***************
253    2019-02-04 00:49    34  ***************
254    2019-02-04 00:50    35  ****************
...    ..(  5 skipped).    ..  ****************
260    2019-02-04 00:56    35  ****************
261    2019-02-04 00:57    36  *****************
...    ..( 12 skipped).    ..  *****************
274    2019-02-04 01:10    36  *****************
275    2019-02-04 01:11    37  ******************
...    ..(  3 skipped).    ..  ******************
279    2019-02-04 01:15    37  ******************
280    2019-02-04 01:16     ?  -
281    2019-02-04 01:17    24  *****
282    2019-02-04 01:18     ?  -
283    2019-02-04 01:19    25  ******
284    2019-02-04 01:20    25  ******
285    2019-02-04 01:21    25  ******
286    2019-02-04 01:22    26  *******
287    2019-02-04 01:23    27  ********
288    2019-02-04 01:24    27  ********
289    2019-02-04 01:25     ?  -
290    2019-02-04 01:26    30  ***********
...    ..(  3 skipped).    ..  ***********
294    2019-02-04 01:30    30  ***********
295    2019-02-04 01:31    31  ************
296    2019-02-04 01:32     ?  -
297    2019-02-04 01:33    32  *************
...    ..(  4 skipped).    ..  *************
302    2019-02-04 01:38    32  *************
303    2019-02-04 01:39    33  **************
304    2019-02-04 01:40    33  **************
305    2019-02-04 01:41    33  **************
306    2019-02-04 01:42    34  ***************
...    ..(  2 skipped).    ..  ***************
309    2019-02-04 01:45    34  ***************
310    2019-02-04 01:46     ?  -
311    2019-02-04 01:47    35  ****************
312    2019-02-04 01:48    35  ****************
313    2019-02-04 01:49    35  ****************
314    2019-02-04 01:50     ?  -
315    2019-02-04 01:51    36  *****************
...    ..(  4 skipped).    ..  *****************
320    2019-02-04 01:56    36  *****************
321    2019-02-04 01:57     ?  -
322    2019-02-04 01:58    37  ******************
...    ..( 10 skipped).    ..  ******************
333    2019-02-04 02:09    37  ******************
334    2019-02-04 02:10    38  *******************
...    ..( 10 skipped).    ..  *******************
345    2019-02-04 02:21    38  *******************
346    2019-02-04 02:22    39  ********************
...    ..( 11 skipped).    ..  ********************
358    2019-02-04 02:34    39  ********************
359    2019-02-04 02:35     ?  -
360    2019-02-04 02:36    31  ************
361    2019-02-04 02:37    31  ************
362    2019-02-04 02:38    31  ************
363    2019-02-04 02:39    30  ***********
...    ..( 17 skipped).    ..  ***********
381    2019-02-04 02:57    30  ***********
382    2019-02-04 02:58    29  **********
...    ..( 17 skipped).    ..  **********
400    2019-02-04 03:16    29  **********
401    2019-02-04 03:17    28  *********
...    ..( 13 skipped).    ..  *********
415    2019-02-04 03:31    28  *********
416    2019-02-04 03:32    27  ********
...    ..( 13 skipped).    ..  ********
430    2019-02-04 03:46    27  ********
431    2019-02-04 03:47    28  *********
...    ..(  3 skipped).    ..  *********
435    2019-02-04 03:51    28  *********
436    2019-02-04 03:52     ?  -
437    2019-02-04 03:53    28  *********
...    ..( 94 skipped).    ..  *********
  54    2019-02-04 05:28    28  *********
  55    2019-02-04 05:29     ?  -
  56    2019-02-04 05:30    27  ********
...    ..( 20 skipped).    ..  ********
  77    2019-02-04 05:51    27  ********
  78    2019-02-04 05:52    28  *********
...    ..( 14 skipped).    ..  *********
  93    2019-02-04 06:07    28  *********
SCT Error Recovery Control:
           Read:     70 (7.0 seconds)
          Write:     70 (7.0 seconds)
Device Statistics (GP Log 0x04)
Page  Offset Size        Value Flags Description
0x01  =====  =               =  ===  == General Statistics (rev 1) ==
0x01  0x008  4              43  -D-  Lifetime Power-On Resets
0x01  0x010  4              81  -D-  Power-on Hours
0x01  0x018  6        88467119  -D-  Logical Sectors Written
0x01  0x020  6          983745  -D-  Number of Write Commands
0x01  0x028  6        26850755  -D-  Logical Sectors Read
0x01  0x030  6          170152  -D-  Number of Read Commands
0x01  0x038  6       291600000  -D-  Date and Time TimeStamp
0x01  0x048  2               0  ND-  Workload Utilization
0x03  =====  =               =  ===  == Rotating Media Statistics (rev 1) ==
0x03  0x008  4              81  -D-  Spindle Motor Power-on Hours
0x03  0x010  4              81  -D-  Head Flying Hours
0x03  0x018  4              43  -D-  Head Load Events
0x03  0x020  4               0  -D-  Number of Reallocated Logical Sectors
0x03  0x028  4               0  -D-  Read Recovery Attempts
0x03  0x030  4               0  -D-  Number of Mechanical Start Failures
0x03  0x038  4               0  -D-  Number of Realloc. Candidate Logical Sectors
0x03  0x040  4              34  -D-  Number of High Priority Unload Events
0x04  =====  =               =  ===  == General Errors Statistics (rev 1) ==
0x04  0x008  4               0  -D-  Number of Reported Uncorrectable Errors
0x04  0x010  4             632  -D-  Resets Between Cmd Acceptance and Completion
0x05  =====  =               =  ===  == Temperature Statistics (rev 1) ==
0x05  0x008  1              28  -D-  Current Temperature
0x05  0x010  1              37  -D-  Average Short Term Temperature
0x05  0x018  1               -  -D-  Average Long Term Temperature
0x05  0x020  1              41  -D-  Highest Temperature
0x05  0x028  1              25  -D-  Lowest Temperature
0x05  0x030  1              40  -D-  Highest Average Short Term Temperature
0x05  0x038  1              37  -D-  Lowest Average Short Term Temperature
0x05  0x040  1               -  -D-  Highest Average Long Term Temperature
0x05  0x048  1               -  -D-  Lowest Average Long Term Temperature
0x05  0x050  4               0  -D-  Time in Over-Temperature
0x05  0x058  1              60  -D-  Specified Maximum Operating Temperature
0x05  0x060  4               0  -D-  Time in Under-Temperature
0x05  0x068  1               0  -D-  Specified Minimum Operating Temperature
0x06  =====  =               =  ===  == Transport Statistics (rev 1) ==
0x06  0x008  4             798  -D-  Number of Hardware Resets
0x06  0x010  4              96  -D-  Number of ASR Events
0x06  0x018  4               0  -D-  Number of Interface CRC Errors
                                |||_ C monitored condition met
                                ||__ D supports DSN
                                |___ N normalized value
Pending Defects log (GP Log 0x0c) supported [please try: '-l defects']
SATA Phy Event Counters (GP Log 0x11)
ID      Size     Value  Description
0x0001  2            0  Command failed due to ICRC error
0x0002  2            0  R_ERR response for data FIS
0x0003  2            0  R_ERR response for device-to-host data FIS
0x0004  2            0  R_ERR response for host-to-device data FIS
0x0005  2            0  R_ERR response for non-data FIS
0x0006  2            0  R_ERR response for device-to-host non-data FIS
0x0007  2            0  R_ERR response for host-to-device non-data FIS
0x0008  2            0  Device-to-host non-data FIS retries
0x0009  2            1  Transition from drive PhyRdy to drive PhyNRdy
0x000a  2            4  Device-to-host register FISes sent due to a COMRESET
0x000b  2            0  CRC errors within host-to-device FIS
0x000d  2            0  Non-CRC errors within host-to-device FIS
0x000f  2            0  R_ERR response for host-to-device data FIS, CRC
0x0012  2            0  R_ERR response for host-to-device non-data FIS, CRC
0x8000  4            0  Vendor specific
I`m not a spec. but looks like this problem is something with this type of HDD:
WD NAS RED PRO - 2TB - 7200rpm
Device Model: WDC WD2002FFSX-68PF8N0
Firmware Version: 81.00A81
			
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