Quão severo deve ser um disco rígido danificado para ganhar um S.M.A.R.T. status em um Mac

Question

O Seagate Barracuda no meu iMac 2011 começou a ter falhas no disco rígido.

No entanto, o utilitário de disco e informações do sistema reportam S.M.A.R.T. status: verificado

Recupereiinformaçõesdetalhadasusandosmartctldolink :

smartctl 6.7 2018-08-20 r4761 [Darwin 15.6.0 x86_64] (daily-20180820)
Copyright (C) 2002-18, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Seagate Barracuda 7200.12
Device Model:     ST31000528AS
Serial Number:    5VPAE0WQ
LU WWN Device Id: 5 000c50 044e5e5f4
Firmware Version: AP63
User Capacity:    1,000,204,886,016 bytes [1.00 TB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    7200 rpm
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 2.6, 3.0 Gb/s
Local Time is:    Thu Aug 23 12:42:35 2018 CEST

==> WARNING: A firmware update for this drive may be available,
see the following Seagate web pages:
http://knowledge.seagate.com/articles/en_US/FAQ/207931en
http://knowledge.seagate.com/articles/en_US/FAQ/213891en

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
See vendor-specific Attribute list for marginal Attributes.

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:        (  600) 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:    (   1) minutes.
Extended self-test routine
recommended polling time:    ( 171) minutes.
Conveyance self-test routine
recommended polling time:    (   2) minutes.
SCT capabilities:          (0x103f) SCT Status supported.
                    SCT Error Recovery Control supported.
                    SCT Feature Control supported.
                    SCT Data Table supported.

SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x000e   083   077   006    Old_age   Always       -       70023408
  3 Spin_Up_Time            0x0003   100   100   000    Pre-fail  Always       -       0
  4 Start_Stop_Count        0x0032   100   100   020    Old_age   Always       -       419
  5 Reallocated_Sector_Ct   0x0033   100   100   036    Pre-fail  Always       -       2
  7 Seek_Error_Rate         0x000f   080   060   030    Pre-fail  Always       -       109788937
  9 Power_On_Hours          0x0032   055   055   000    Old_age   Always       -       40043
 10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       394
184 End-to-End_Error        0x0032   100   100   099    Old_age   Always       -       0
187 Reported_Uncorrect      0x0032   001   001   000    Old_age   Always       -       3500
188 Command_Timeout         0x0032   100   099   000    Old_age   Always       -       4295032833
189 High_Fly_Writes         0x003a   100   100   000    Old_age   Always       -       0
190 Airflow_Temperature_Cel 0x0022   053   042   045    Old_age   Always   In_the_past 47 (Min/Max 46/47 #3224)
194 Temperature_Celsius     0x0022   047   058   000    Old_age   Always       -       47 (0 13 0 0 0)
195 Hardware_ECC_Recovered  0x001a   042   015   000    Old_age   Always       -       70023408
197 Current_Pending_Sector  0x0012   098   097   000    Old_age   Always       -       109
198 Offline_Uncorrectable   0x0010   098   097   000    Old_age   Offline      -       109
199 UDMA_CRC_Error_Count    0x003e   200   200   000    Old_age   Always       -       0

SMART Error Log Version: 1
ATA Error Count: 3500 (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 3500 occurred at disk power-on lifetime: 40041 hours (1668 days + 9 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 ff ff ff 0f  Error: UNC at LBA = 0x0fffffff = 268435455

  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 08 ff ff ff 4f 00      22:15:49.306  READ FPDMA QUEUED
  27 00 00 00 00 00 e0 00      22:15:49.303  READ NATIVE MAX ADDRESS EXT [OBS-ACS-3]
  ec 00 00 00 00 00 a0 00      22:15:49.266  IDENTIFY DEVICE
  ef 03 46 00 00 00 a0 00      22:15:49.265  SET FEATURES [Set transfer mode]
  27 00 00 00 00 00 e0 00      22:15:49.265  READ NATIVE MAX ADDRESS EXT [OBS-ACS-3]

Error 3499 occurred at disk power-on lifetime: 40041 hours (1668 days + 9 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 ff ff ff 0f  Error: UNC at LBA = 0x0fffffff = 268435455

  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 08 ff ff ff 4f 00      22:15:46.313  READ FPDMA QUEUED
  60 00 08 ff ff ff 4f 00      22:15:46.313  READ FPDMA QUEUED
  27 00 00 00 00 00 e0 00      22:15:46.310  READ NATIVE MAX ADDRESS EXT [OBS-ACS-3]
  ec 00 00 00 00 00 a0 00      22:15:46.309  IDENTIFY DEVICE
  ef 03 46 00 00 00 a0 00      22:15:46.309  SET FEATURES [Set transfer mode]

Error 3498 occurred at disk power-on lifetime: 40041 hours (1668 days + 9 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 ff ff ff 0f  Error: WP at LBA = 0x0fffffff = 268435455

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  61 00 08 ff ff ff 4f 00      22:15:43.320  WRITE FPDMA QUEUED
  60 00 08 ff ff ff 4f 00      22:15:43.317  READ FPDMA QUEUED
  60 00 08 ff ff ff 4f 00      22:15:43.317  READ FPDMA QUEUED
  60 00 08 ff ff ff 4f 00      22:15:43.317  READ FPDMA QUEUED
  27 00 00 00 00 00 e0 00      22:15:43.314  READ NATIVE MAX ADDRESS EXT [OBS-ACS-3]

Error 3497 occurred at disk power-on lifetime: 40041 hours (1668 days + 9 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 ff ff ff 0f  Error: UNC at LBA = 0x0fffffff = 268435455

  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 08 ff ff ff 4f 00      22:15:40.378  READ FPDMA QUEUED
  60 00 08 ff ff ff 4f 00      22:15:40.378  READ FPDMA QUEUED
  60 00 08 ff ff ff 4f 00      22:15:40.378  READ FPDMA QUEUED
  60 00 08 ff ff ff 4f 00      22:15:40.378  READ FPDMA QUEUED
  27 00 00 00 00 00 e0 00      22:15:40.375  READ NATIVE MAX ADDRESS EXT [OBS-ACS-3]

Error 3496 occurred at disk power-on lifetime: 40041 hours (1668 days + 9 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 ff ff ff 0f  Error: UNC at LBA = 0x0fffffff = 268435455

  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 08 ff ff ff 4f 00      22:15:37.423  READ FPDMA QUEUED
  60 00 08 ff ff ff 4f 00      22:15:37.423  READ FPDMA QUEUED
  60 00 08 ff ff ff 4f 00      22:15:37.422  READ FPDMA QUEUED
  60 00 08 ff ff ff 4f 00      22:15:37.422  READ FPDMA QUEUED
  60 00 08 ff ff ff 4f 00      22:15:37.422  READ FPDMA QUEUED

SMART Self-test log structure revision number 1
No self-tests have been logged.  [To run self-tests, use: smartctl -t]

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.

Isso não parece muito bom: setores pendentes, incorrigíveis, erros registrados.

Carregando a saída no Linux no GSmartControl:

Estou pensando:

1. Eu tenho um disco rígido quebrado que resulta em falhas de leitura / gravação e no sistema de arquivos
2. S.M.A.R.T. atributos confirmam que a unidade está quebrada

Por que meu iMac ainda reporta um S.M.A.R.T. status?