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HDD が 壊れるとどうなるのか。Smarttoolsで見てみた結果

HDDが壊れるとどうなるのか

復旧する前に確認しておくことにした。

smart でエラーが見られるのですが、いままで手元のHDDがエラーを出したことがなかった。

エラーが出たので記念に残すことにした。

Smartでエラーが出たらこうなります。ってのを覚えておくと、復旧や調査に役に立つとおもうので残しておくことにする。

takuya@:~$ sudo smartctl -a /dev/sdb
smartctl 5.41 2011-06-09 r3365 [x86_64-linux-3.2.0-4-amd64] (local build)
Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Caviar Green (Adv. Format)
Device Model:     WDC WD20EARS-00MVWB0
Serial Number:    WD-WMAZA0636931
LU WWN Device Id: 5 0014ee 6ab131a6e
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:   8
ATA Standard is:  Exact ATA specification draft version not indicated
Local Time is:    Sat Jun  4 21:25:12 2016 JST
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:        (39300) 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:    ( 255) 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   146   146   051    Pre-fail  Always       -       116358
  3 Spin_Up_Time            0x0027   174   159   021    Pre-fail  Always       -       6291
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       383
  5 Reallocated_Sector_Ct   0x0033   166   166   140    Pre-fail  Always       -       736
  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
  9 Power_On_Hours          0x0032   036   036   000    Old_age   Always       -       47139
 10 Spin_Retry_Count        0x0032   100   100   000    Old_age   Always       -       0
 11 Calibration_Retry_Count 0x0032   100   100   000    Old_age   Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       259
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       204
193 Load_Cycle_Count        0x0032   053   053   000    Old_age   Always       -       443158
194 Temperature_Celsius     0x0022   114   084   000    Old_age   Always       -       36
196 Reallocated_Event_Count 0x0032   001   001   000    Old_age   Always       -       421
197 Current_Pending_Sector  0x0032   199   197   000    Old_age   Always       -       537
198 Offline_Uncorrectable   0x0030   200   141   000    Old_age   Offline      -       290
199 UDMA_CRC_Error_Count    0x0032   200   181   000    Old_age   Always       -       209
200 Multi_Zone_Error_Rate   0x0008   122   001   000    Old_age   Offline      -       20879

SMART Error Log Version: 1
ATA Error Count: 51642 (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 51642 occurred at disk power-on lifetime: 28060 hours (1169 days + 4 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
  -- -- -- -- -- -- --
  04 61 02 00 00 00 a0  Device Fault; Error: ABRT

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  ef 10 02 00 00 00 a0 08  22d+07:01:03.463  SET FEATURES [Reserved for Serial ATA]
  ec 00 00 00 00 00 a0 08  22d+07:01:03.458  IDENTIFY DEVICE
  ef 03 46 00 00 00 a0 08  22d+07:01:03.458  SET FEATURES [Set transfer mode]
  ef 10 02 00 00 00 a0 08  22d+07:01:03.458  SET FEATURES [Reserved for Serial ATA]
  ec 00 00 00 00 00 a0 08  22d+07:01:03.453  IDENTIFY DEVICE

Error 51641 occurred at disk power-on lifetime: 28060 hours (1169 days + 4 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
  -- -- -- -- -- -- --
  04 61 46 00 00 00 a0  Device Fault; Error: ABRT

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  ef 03 46 00 00 00 a0 08  22d+07:01:03.458  SET FEATURES [Set transfer mode]
  ef 10 02 00 00 00 a0 08  22d+07:01:03.458  SET FEATURES [Reserved for Serial ATA]
  ec 00 00 00 00 00 a0 08  22d+07:01:03.453  IDENTIFY DEVICE
  ef 10 02 00 00 00 a0 08  22d+07:01:03.453  SET FEATURES [Reserved for Serial ATA]

Error 51640 occurred at disk power-on lifetime: 28060 hours (1169 days + 4 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
  -- -- -- -- -- -- --
  04 61 02 00 00 00 a0  Device Fault; Error: ABRT

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  ef 10 02 00 00 00 a0 08  22d+07:01:03.458  SET FEATURES [Reserved for Serial ATA]
  ec 00 00 00 00 00 a0 08  22d+07:01:03.453  IDENTIFY DEVICE
  ef 10 02 00 00 00 a0 08  22d+07:01:03.453  SET FEATURES [Reserved for Serial ATA]
  ec 00 00 00 00 00 a0 08  22d+07:01:03.448  IDENTIFY DEVICE

Error 51639 occurred at disk power-on lifetime: 28060 hours (1169 days + 4 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
  -- -- -- -- -- -- --
  04 61 02 00 00 00 a0  Device Fault; Error: ABRT

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  ef 10 02 00 00 00 a0 08  22d+07:01:03.453  SET FEATURES [Reserved for Serial ATA]
  ec 00 00 00 00 00 a0 08  22d+07:01:03.448  IDENTIFY DEVICE
  ef 03 46 00 00 00 a0 08  22d+07:01:03.448  SET FEATURES [Set transfer mode]
  ef 10 02 00 00 00 a0 08  22d+07:01:03.448  SET FEATURES [Reserved for Serial ATA]
  ec 00 00 00 00 00 a0 08  22d+07:01:03.443  IDENTIFY DEVICE

Error 51638 occurred at disk power-on lifetime: 28060 hours (1169 days + 4 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
  -- -- -- -- -- -- --
  04 61 46 00 00 00 a0  Device Fault; Error: ABRT

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  ef 03 46 00 00 00 a0 08  22d+07:01:03.448  SET FEATURES [Set transfer mode]
  ef 10 02 00 00 00 a0 08  22d+07:01:03.448  SET FEATURES [Reserved for Serial ATA]
  ec 00 00 00 00 00 a0 08  22d+07:01:03.443  IDENTIFY DEVICE
  ef 10 02 00 00 00 a0 08  22d+07:01:03.443  SET FEATURES [Reserved for Serial ATA]

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.

ちなみに正常なときは

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   181   167   021    Pre-fail  Always       -       5941
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       654
  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   047   047   000    Old_age   Always       -       39322
 10 Spin_Retry_Count        0x0032   100   100   000    Old_age   Always       -       0
 11 Calibration_Retry_Count 0x0032   100   100   000    Old_age   Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       226
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       192
193 Load_Cycle_Count        0x0032   162   162   000    Old_age   Always       -       115939
194 Temperature_Celsius     0x0022   116   085   000    Old_age   Always       -       34
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       -       3
200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       0

こんな感じ。

エラーレートがこんな数字でも動くんだからHDDってすごい。

READメインディスクだし、別にどうってこと無い。RAIDでソコまで気にしなくても良いんだなぁって思う。限界まで行くぜ

RAID方式に変わる、HDD 式年遷宮方式

RAIDによるミラーリングは、メンテコストや初期投資、初期設定コストがかかるので、伊勢神宮式年遷宮と同様に、一定期間経過後に、HDDの中身を新しいHDDに丸ごとお引越しするHDD式年遷宮を、お手軽なバックアップとデータ担保の手法として名付けたい。

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