I've been taking a look at some failed hard drives and confused over SMART and how it concludes its assessments as 'PASSED' for drives which get identified as failed by datacenter technicians.
I've left an example SMART report for a failed drive which was replaced below.
My questions are:
Seeing the report below, how would 1 accurately conclude a drives faulty state, was my initial assumption to check Offline Uncorrectables and reallocated sectors a sure-fire way of determining that this drive is faulty, or are their ways to fix this software wise without replacing a whole HDD?
Was there tips and tricks technicians have for scenarios to make it easier for anyone to understand a report such as this?
=== 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: ( 113) seconds.
Offline data collection
capabilities: (0x5b) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Suspend Offline collection upon new
command.
Offline surface scan supported.
Self-test supported.
No 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: ( 288) minutes.
SCT capabilities: (0x003d) 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 0x000b 100 100 016 Pre-fail Always - 0
2 Throughput_Performance 0x0005 137 137 054 Pre-fail Offline - 104
3 Spin_Up_Time 0x0007 144 144 024 Pre-fail Always - 207 (Average 206)
4 Start_Stop_Count 0x0012 100 100 000 Old_age Always - 40
5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 2
7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always - 0
8 Seek_Time_Performance 0x0005 128 128 020 Pre-fail Offline - 18
9 Power_On_Hours 0x0012 097 097 000 Old_age Always - 22634
10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 40
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 936
193 Load_Cycle_Count 0x0012 100 100 000 Old_age Always - 936
194 Temperature_Celsius 0x0002 187 187 000 Old_age Always - 32 (Min/Max 17/53)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 2
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 1
198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 134
199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always - 0
SMART Error Log Version: 1
ATA Error Count: 17 (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 17 occurred at disk power-on lifetime: 21280 hours (886 days + 16 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 41 00 00 00 00 00 Error: UNC at LBA = 0x00000000 = 0
Commands leading to the command that caused the error were:
CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
-- -- -- -- -- -- -- -- ---------------- --------------------
60 00 18 00 83 ec 40 08 9d+19:20:00.448 READ FPDMA QUEUED
60 00 10 00 82 ec 40 08 9d+19:19:57.618 READ FPDMA QUEUED
60 00 08 00 81 ec 40 08 9d+19:19:57.617 READ FPDMA QUEUED
60 00 00 00 80 ec 40 08 9d+19:19:57.617 READ FPDMA QUEUED
60 00 f0 00 7f ec 40 08 9d+19:19:57.616 READ FPDMA QUEUED
Error 16 occurred at disk power-on lifetime: 18424 hours (767 days + 16 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 43 00 00 00 00 00 Error: UNC at LBA = 0x00000000 = 0
Commands leading to the command that caused the error were:
CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
-- -- -- -- -- -- -- -- ---------------- --------------------
60 00 38 00 f0 ed 40 08 16d+00:38:38.932 READ FPDMA QUEUED
60 00 30 00 ef ed 40 08 16d+00:38:36.185 READ FPDMA QUEUED
60 00 28 00 ee ed 40 08 16d+00:38:36.184 READ FPDMA QUEUED
60 00 20 00 ed ed 40 08 16d+00:38:36.184 READ FPDMA QUEUED
60 00 18 00 ec ed 40 08 16d+00:38:36.183 READ FPDMA QUEUED
Error 15 occurred at disk power-on lifetime: 18424 hours (767 days + 16 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 43 00 00 00 00 00 Error: UNC at LBA = 0x00000000 = 0
Commands leading to the command that caused the error were:
CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
-- -- -- -- -- -- -- -- ---------------- --------------------
60 00 98 00 70 ed 40 08 16d+00:38:35.858 READ FPDMA QUEUED
60 00 90 00 6f ed 40 08 16d+00:38:33.101 READ FPDMA QUEUED
60 00 88 00 6e ed 40 08 16d+00:38:33.101 READ FPDMA QUEUED
60 00 80 00 6d ed 40 08 16d+00:38:33.100 READ FPDMA QUEUED
60 00 78 00 6c ed 40 08 16d+00:38:33.100 READ FPDMA QUEUED
Error 14 occurred at disk power-on lifetime: 18424 hours (767 days + 16 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 43 00 00 00 00 00 Error: UNC at LBA = 0x00000000 = 0
Commands leading to the command that caused the error were:
CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
-- -- -- -- -- -- -- -- ---------------- --------------------
60 00 20 00 63 ed 40 08 16d+00:38:31.149 READ FPDMA QUEUED
60 00 18 00 62 ed 40 08 16d+00:38:28.310 READ FPDMA QUEUED
60 00 10 00 61 ed 40 08 16d+00:38:28.309 READ FPDMA QUEUED
60 00 08 00 60 ed 40 08 16d+00:38:28.308 READ FPDMA QUEUED
60 00 00 00 5f ed 40 08 16d+00:38:28.308 READ FPDMA QUEUED
Error 13 occurred at disk power-on lifetime: 18258 hours (760 days + 18 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 43 00 00 00 00 00 Error: UNC at LBA = 0x00000000 = 0
Commands leading to the command that caused the error were:
CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
-- -- -- -- -- -- -- -- ---------------- --------------------
60 08 18 90 82 ed 40 08 9d+02:34:40.061 READ FPDMA QUEUED
60 08 10 88 82 ed 40 08 9d+02:34:37.305 READ FPDMA QUEUED
61 08 08 88 82 ed 40 08 9d+02:34:37.305 WRITE FPDMA QUEUED
ef 10 02 00 00 00 a0 08 9d+02:34:37.296 SET FEATURES [Enable SATA feature]
27 00 00 00 00 00 e0 08 9d+02:34:37.295 READ NATIVE MAX ADDRESS EXT [OBS-ACS-3]
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% 22610 -
# 2 Short offline Completed without error 00% 16798 -
# 3 Short offline Completed without error 00% 16791 -
# 4 Short offline Completed without error 00% 16790 -
# 5 Short offline Completed without error 00% 16790 -
# 6 Short offline Completed without error 00% 16783 -
# 7 Short offline Completed without error 00% 16782 -
# 8 Short offline Completed without error 00% 16737 -
# 9 Short offline Completed without error 00% 16662 -
#10 Short offline Completed without error 00% 16642 -
#11 Short offline Completed without error 00% 16635 -
#12 Short offline Completed without error 00% 241 -
#13 Short offline Completed without error 00% 239 -
#14 Short offline Completed without error 00% 239 -
#15 Short offline Completed without error 00% 2 -
#16 Short offline Completed without error 00% 1 -
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.
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