smartctl报告总体运行状况测试通过了，但是测试失败了？

debugcn 发表于 Dev

克里斯·斯特里钦斯基（Chris Stryczynski）

SMART overall-health self-assessment test result: PASSED当两项测试失败时，为什么会显示？

sudo smartctl -a /dev/sdc 
smartctl 6.6 2018-12-05 r4851 [x86_64-linux-4.14.98] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital AV-GP (AF)
Device Model:     WDC WD20EURS-63SPKY0
Serial Number:    WD-WMC1T2763021
LU WWN Device Id: 5 0014ee 6addb4b7c
Firmware Version: 80.00A80
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:   ACS-2 (minor revision not indicated)
SATA Version is:  SATA 3.0, 3.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Sun Feb 24 13:43:30 2019 GMT
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:      ( 117) The previous self-test completed having
                    the read element of the test failed.
Total time to complete Offline 
data collection:        (27240) 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:    ( 275) minutes.
Conveyance self-test routine
recommended polling time:    (   5) minutes.
SCT capabilities:          (0x70b5) 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   180   179   021    Pre-fail  Always       -       5991
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       113
  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   092   092   000    Old_age   Always       -       6354
 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       -       56
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       46
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       66
194 Temperature_Celsius     0x0022   122   114   000    Old_age   Always       -       28
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   200   200   000    Old_age   Offline      -       1

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: read failure       50%      6354         4377408
# 2  Extended offline    Completed: read failure       90%      6354         4377408

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.

弗雷迪

因为您的SMART属性都处于良好状态，所以存在No Errors Logged。

请阅读：ATA驱动器自检失败，但是SMART运行状况为“通过”。这是怎么回事？

如果驱动器无法通过自检，但仍具有“通过” SMART运行状况，则通常意味着磁盘上的扇区已损坏（uncorrectable = UNC）。这意味着存储在该扇区的ECC数据与存储在该扇区的用户数据不一致，并且尝试读取该扇区失败并显示UNC错误。这可能是一次性的瞬态效果：在磁盘写入扇区时突然断电，损坏了ECC代码或数据，但是该扇区可以正确存储新数据。或它可能是永久性的：磁介质已被一点灰尘损坏，并且该扇区无法正确存储新数据。

如果磁盘可以一次读取数据扇区，并且损坏是永久的而不是暂时的，则磁盘固件会将扇区标记为“坏”，并分配一个备用扇区来替换它。但是，如果磁盘甚至一次都无法读取该扇区，那么它将不会重新分配该扇区，以期能够在将来的某个时候从中读取数据。写入不可读（损坏）的扇区将解决此问题。如果损坏是暂时的，则新的一致数据将被写入该扇区。如果damange是永久性的，则写入将强制重新分配扇区。有关如何强制重新分配此扇区的说明，请参见Bad block HOWTO（仅限Linux）。

磁盘仍处于运行状况，因为固件未找到其他故障迹象，例如伺服器故障。

通常可以通过使用磁盘制造商的“磁盘评估和修复”实用程序来修复此类磁盘。当心：这可能会强制重新分配丢失的扇区，从而损坏或破坏磁盘上的任何文件系统。有关一般Linux的说明，请参见错误块HOWTO。