disk failed

[kevinevo7]

Hi,

In my RAID 5 config there is one disk that has unreadable sectors:

Apr 29 16:03:35 nas4free smartd[1864]: Device: /dev/ada1, 1312 Currently unreadable (pending) sectors
Apr 29 16:03:35 nas4free smartd[1864]: Device: /dev/ada1, 2 Offline uncorrectable sectors

It is a WD20EARS and I want to replace it, can I use another type of disk? Or does it need to be the same?

Regards,

Kevin

[b0ssman]

it just needs to be the same size or bigger.

the data in those sectors might now be corrupt, as raid5 does not support checksuming.

[kevinevo7]

OK , thanks for your anwser.

[crowi]

Hi kevinevo7,

could you also post the other smart values? Or at least power on hours and load cycle count?
I am just curious I was using a bunch of these disks in the past too and had many problems with them. My types were either wd15ears and wd20ears...
And just yesterday a problem with a wd15ears appeared in the german sub-forum.
So it is only my forensic interest in this

Thanks,
crowi

[kevinevo7]

Hi Crowi,

Sure no problem, if you see some strange values, let me know.

Here you go:

Code: Select all

Device /dev/ada0 - WDC WD20EARS-00MVWB0 51.0AB51 
=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Caviar Green (AF)
Device Model:     WDC WD20EARS-00MVWB0
Serial Number:    WD-WMAZA3500570
LU WWN Device Id: 5 0014ee 6ab74453d
Firmware Version: 51.0AB51
User Capacity:    2,000,398,934,016 bytes [2.00 TB]
Sector Size:      512 bytes logical/physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 2.6, 3.0 Gb/s
Local Time is:    Wed Apr 30 09:43:51 2014 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:  (0x84)	Offline data collection activity
					was suspended by an interrupting command from host.
					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: 		(36960) 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: 	 ( 357) minutes.
Conveyance self-test routine
recommended polling time: 	 (   5) minutes.
SCT capabilities: 	       (0x3035)	SCT Status 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   253   169   021    Pre-fail  Always       -       1091
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       173
  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   067   067   000    Old_age   Always       -       24768
 10 Spin_Retry_Count        0x0032   100   100   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       -       85
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       75
193 Load_Cycle_Count        0x0032   171   171   000    Old_age   Always       -       89601
194 Temperature_Celsius     0x0022   120   107   000    Old_age   Always       -       30
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   200   200   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      -       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%     20310         -
# 2  Short offline       Completed without error       00%     20309         -
# 3  Short offline       Completed without error       00%     20308         -
# 4  Short offline       Completed without error       00%     20307         -
# 5  Short offline       Completed without error       00%     20306         -
# 6  Short offline       Completed without error       00%     20305         -
# 7  Short offline       Completed without error       00%     20304         -
# 8  Short offline       Completed without error       00%     20303         -
# 9  Short offline       Completed without error       00%     20302         -
#10  Short offline       Completed without error       00%     20301         -
#11  Short offline       Completed without error       00%     20300         -
#12  Short offline       Completed without error       00%     20299         -
#13  Short offline       Completed without error       00%     20298         -
#14  Short offline       Completed without error       00%     20297         -
#15  Short offline       Completed without error       00%     20296         -
#16  Short offline       Completed without error       00%     20295         -
#17  Short offline       Completed without error       00%     20294         -
#18  Short offline       Completed without error       00%     20293         -
#19  Short offline       Completed without error       00%     20292         -
#20  Short offline       Completed without error       00%     20291         -
#21  Short offline       Completed without error       00%     20290         -

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.
 
Device /dev/ada1 - WDC WD20EARS-00MVWB0 51.0AB51 
=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Caviar Green (AF)
Device Model:     WDC WD20EARS-00MVWB0
Serial Number:    WD-WMAZA3476143
LU WWN Device Id: 5 0014ee 600c9824a
Firmware Version: 51.0AB51
User Capacity:    2,000,398,934,016 bytes [2.00 TB]
Sector Size:      512 bytes logical/physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 2.6, 3.0 Gb/s
Local Time is:    Wed Apr 30 09:43:51 2014 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:  (0x84)	Offline data collection activity
					was suspended by an interrupting command from host.
					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: 		(35880) 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: 	 ( 346) minutes.
Conveyance self-test routine
recommended polling time: 	 (   5) minutes.
SCT capabilities: 	       (0x3035)	SCT Status 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   147   147   051    Pre-fail  Always       -       78982
  3 Spin_Up_Time            0x0027   253   164   021    Pre-fail  Always       -       1208
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       178
  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   067   067   000    Old_age   Always       -       24677
 10 Spin_Retry_Count        0x0032   100   100   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       -       87
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       77
193 Load_Cycle_Count        0x0032   171   171   000    Old_age   Always       -       89597
194 Temperature_Celsius     0x0022   120   108   000    Old_age   Always       -       30
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0032   196   196   000    Old_age   Always       -       1312
198 Offline_Uncorrectable   0x0030   200   197   000    Old_age   Offline      -       2
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x0008   162   054   000    Old_age   Offline      -       10193

SMART Error Log Version: 1
ATA Error Count: 2
	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 2 occurred at disk power-on lifetime: 24329 hours (1013 days + 17 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 40 e8 b3 8d 4e  Error: UNC 64 sectors at LBA = 0x0e8db3e8 = 244167656

  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 40 c0 b3 8d 4e 08  45d+10:43:18.552  READ DMA
  c8 00 40 c0 b3 8d 4e 08  45d+10:43:15.721  READ DMA
  c8 00 80 00 2f 87 4e 08  45d+10:43:15.711  READ DMA

Error 1 occurred at disk power-on lifetime: 24329 hours (1013 days + 17 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 40 d8 b3 8d 4e  Error: UNC 64 sectors at LBA = 0x0e8db3d8 = 244167640

  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 40 c0 b3 8d 4e 08  45d+10:43:15.721  READ DMA
  c8 00 80 00 2f 87 4e 08  45d+10:43:15.711  READ DMA

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%     20333         -
# 2  Short offline       Completed without error       00%     20332         -
# 3  Short offline       Completed: read failure       80%     20331         2583502935
# 4  Short offline       Completed without error       00%     20330         -
# 5  Short offline       Completed without error       00%     20329         -
# 6  Short offline       Completed without error       00%     20328         -
# 7  Short offline       Completed: read failure       80%     20327         2583502934
# 8  Short offline       Completed: read failure       90%     20326         2318663509
# 9  Short offline       Completed without error       00%     20325         -
#10  Short offline       Completed without error       00%     20324         -
#11  Short offline       Completed: read failure       80%     20323         2583502934
#12  Short offline       Completed without error       00%     20322         -
#13  Short offline       Completed without error       00%     20321         -
#14  Short offline       Completed without error       00%     20320         -
#15  Short offline       Completed without error       00%     20319         -
#16  Short offline       Completed without error       00%     20318         -
#17  Short offline       Completed without error       00%     20317         -
#18  Short offline       Completed without error       00%     20316         -
#19  Short offline       Completed without error       00%     20315         -
#20  Short offline       Completed without error       00%     20314         -
#21  Short offline       Completed without error       00%     20313         -

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.
 
Device /dev/ada2 - WDC WD20EARS-00MVWB0 51.0AB51 
=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Caviar Green (AF)
Device Model:     WDC WD20EARS-00MVWB0
Serial Number:    WD-WCAZA8152756
LU WWN Device Id: 5 0014ee 25b4bfc51
Firmware Version: 51.0AB51
User Capacity:    2,000,398,934,016 bytes [2.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 2.6, 3.0 Gb/s
Local Time is:    Wed Apr 30 09:43:51 2014 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:  (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: 		(37560) 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: 	 ( 362) minutes.
Conveyance self-test routine
recommended polling time: 	 (   5) minutes.
SCT capabilities: 	       (0x3035)	SCT Status 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   203   174   021    Pre-fail  Always       -       4825
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       70
  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   069   069   000    Old_age   Always       -       22664
 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       -       68
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       61
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       15
194 Temperature_Celsius     0x0022   121   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       -       0
198 Offline_Uncorrectable   0x0030   200   200   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      -       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%     18413         -
# 2  Short offline       Completed without error       00%     18412         -
# 3  Short offline       Completed without error       00%     18411         -
# 4  Short offline       Completed without error       00%     18410         -
# 5  Short offline       Completed without error       00%     18409         -
# 6  Short offline       Completed without error       00%     18408         -
# 7  Short offline       Completed without error       00%     18407         -
# 8  Short offline       Completed without error       00%     18406         -
# 9  Short offline       Completed without error       00%     18405         -
#10  Short offline       Completed without error       00%     18404         -
#11  Short offline       Completed without error       00%     18403         -
#12  Short offline       Completed without error       00%     18402         -
#13  Short offline       Completed without error       00%     18401         -
#14  Short offline       Completed without error       00%     18400         -
#15  Short offline       Completed without error       00%     18399         -
#16  Short offline       Completed without error       00%     18398         -
#17  Short offline       Completed without error       00%     18397         -
#18  Short offline       Completed without error       00%     18396         -
#19  Short offline       Completed without error       00%     18395         -
#20  Short offline       Completed without error       00%     18394         -
#21  Short offline       Completed without error       00%     18393         -

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.
 
Device /dev/ada3 - WDC WD20EARS-00MVWB0 51.0AB51 
=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Caviar Green (AF)
Device Model:     WDC WD20EARS-00MVWB0
Serial Number:    WD-WCAZA8174956
LU WWN Device Id: 5 0014ee 205f6d873
Firmware Version: 51.0AB51
User Capacity:    2,000,398,934,016 bytes [2.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 2.6, 3.0 Gb/s
Local Time is:    Wed Apr 30 09:43:51 2014 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:  (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: 		(36960) 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: 	 ( 357) minutes.
Conveyance self-test routine
recommended polling time: 	 (   5) minutes.
SCT capabilities: 	       (0x3035)	SCT Status 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   202   169   021    Pre-fail  Always       -       4866
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       70
  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   069   069   000    Old_age   Always       -       22739
 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       -       68
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       62
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       14
194 Temperature_Celsius     0x0022   121   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       -       0
198 Offline_Uncorrectable   0x0030   200   200   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      -       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%     18492         -
# 2  Short offline       Completed without error       00%     18491         -
# 3  Short offline       Completed without error       00%     18490         -
# 4  Short offline       Completed without error       00%     18489         -
# 5  Short offline       Completed without error       00%     18488         -
# 6  Short offline       Completed without error       00%     18487         -
# 7  Short offline       Completed without error       00%     18486         -
# 8  Short offline       Completed without error       00%     18485         -
# 9  Short offline       Completed without error       00%     18484         -
#10  Short offline       Completed without error       00%     18483         -
#11  Short offline       Completed without error       00%     18482         -
#12  Short offline       Completed without error       00%     18481         -
#13  Short offline       Completed without error       00%     18480         -
#14  Short offline       Completed without error       00%     18479         -
#15  Short offline       Completed without error       00%     18478         -
#16  Short offline       Completed without error       00%     18477         -
#17  Short offline       Completed without error       00%     18476         -
#18  Short offline       Completed without error       00%     18475         -
#19  Short offline       Completed without error       00%     18474         -
#20  Short offline       Completed without error       00%     18473         -
#21  Short offline       Completed without error       00%     18472         -

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.

[crowi]

Thank you so much!

That confirms my assumption that there was a problem with some batches of this kind of disks.

Two of your drives show a high load cycle count (although not critical yet), which is a known head parking problem of the WD greens and can be fixed with the 'wdidle' from WD. Heavy use of head parking wears out the mechanics.

But, as you said, one of them (Device /dev/ada1) is already dying

You should fix your other drive /dev/ada0 with wdidle before it is too late...

Your third and fourth drive is not affected, although all of your drives have similar age and were powered on not too often.
Please think about exchanging the drives in near to mid future, from my personal experience I wouldn't have too much trust in them.

Cheers,
Crowi

[kevinevo7]

Hi,

I was aware of de head parking problem, I've fixed it with the Wdidle tool already.
The reason that the first two drive's have a higher load cycle count is that they have worked for a year without the fix. At that time I wasn't aware of the problem.
The other 2 are bought 1 year later and then I applied the fix to all the drives.

Thanks for your info.

Kevin

[crowi]

Hi,

ahh, okay makes sense for me now.
Anyway, keep an extra eye on these disks and backup your data, to be safe.

Sidenote: I don't know why WD does this, but on the newer WD REDs they implemented the 'intelligent parking' function now as well, although nobody needs it.

Cheers,
Crowi

[b0ssman]

well its a nice way to sell new hard drives.
they will fail because of excessive head parking, but normally after the warranty has run out.

[crowi]

Yes, b0ssman, I think you are right again, this time unfortunately...

just a half year ago I discovered that my work-notebook's WD blue drive has the same crappy feature:

wd_blue.png

I fixed it after already >850.000 parking cycles (600.000 are listed in the drive specs)
Here I won't be worried if this drive dies, will get a bigger one then

[b0ssman]

a very nice explanation of the problem.

http://forums.freenas.org/index.php?thr ... exe.18171/

[crowi]

thanks b0ssman, nice find. Somehow I like cyberjocks writing style in all of his posts

[kevinevo7]

Hi,
I've replaced de disk. The raid is in rebuilding state.
But I can't mount it, is that normal?
I receice this error:
May 9 15:06:49 nas4free root: mount: /dev/ufsid/528e769ba03c3c60: Invalid argument
May 9 15:06:49 nas4free root: Error: Failed to mount /dev/ufsid/528e769ba03c3c60 using UFS

[ku-gew]

I don't see any Current Pending Sectors in the SMART log posted.
That kind of failure can happen and is not a clear indication of a failing drive, unless you have tens of them. Only 2? no worry.

[b0ssman]

can you manually mount the drive on the command line using the /dev/raid5/<device> ?

[kevinevo7]

Hi, I formated the raid, and restored tha data.
Thanks for your support.