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How to check disk health in Linux

Quite simple: smartctl -a [device]
What this does it simply read and process S.M.A.R.T. data.

For even more details, see: http://www.cyberciti.biz/tips/linux-find-out-if-harddisk-failing.html
(for instance smartctl -d ata -t long [device])

Below is an example output from one of my drives, with some issues:

> smartctl -a /dev/sda
smartctl 5.42 2011-10-20 r3458 [x86_64-linux-3.2.13-grsec-xxxx-grs-ipv6-64] (SUSE RPM)
Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF INFORMATION SECTION ===
Device Model:     ST2000DM001-XXXXXX
Serial Number:    Z1XXXXXX
LU WWN Device Id: 5 xxxxxx xxxxxxxxx
Firmware Version: CC4H
User Capacity:    2,000,398,934,016 bytes [2.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   8
ATA Standard is:  ATA-8-ACS revision 4
Local Time is:    Thu Jul 25 04:48:14 2013 EDT
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:      (   0) The previous self-test routine completed
                                        without error or no self-test has ever
                                        been run.
Total time to complete Offline
data collection:                (  575) seconds.
Offline data collection
capabilities:                    (0x73) SMART execute Offline immediate.
                                        Auto Offline data collection on/off support.
                                        Suspend Offline collection upon new
                                        command.
                                        No 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:        ( 224) minutes.
Conveyance self-test routine
recommended polling time:        (   2) minutes.
SCT capabilities:              (0x3085) SCT Status 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     0x000f   115   097   006    Pre-fail  Always       -       96680688
  3 Spin_Up_Time            0x0003   094   094   000    Pre-fail  Always       -       0
  4 Start_Stop_Count        0x0032   100   100   020    Old_age   Always       -       85
  5 Reallocated_Sector_Ct   0x0033   100   100   036    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000f   087   060   030    Pre-fail  Always       -       4947608449
  9 Power_On_Hours          0x0032   090   090   000    Old_age   Always       -       8765
 10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       83
183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0
184 End-to-End_Error        0x0032   100   100   099    Old_age   Always       -       0
187 Reported_Uncorrect      0x0032   001   001   000    Old_age   Always       -       576
188 Command_Timeout         0x0032   100   095   000    Old_age   Always       -       4295032841
189 High_Fly_Writes         0x003a   100   100   000    Old_age   Always       -       0
190 Airflow_Temperature_Cel 0x0022   065   056   045    Old_age   Always       -       35 (Min/Max 18/43)
191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       0
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       82
193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       957
194 Temperature_Celsius     0x0022   035   044   000    Old_age   Always       -       35 (0 7 0 0 0)
197 Current_Pending_Sector  0x0012   097   097   000    Old_age   Always       -       600
198 Offline_Uncorrectable   0x0010   097   097   000    Old_age   Offline      -       600
199 UDMA_CRC_Error_Count    0x003e   200   200   000    Old_age   Always       -       0
240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       111368501993865
241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       96320646201
242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       1482116076162

SMART Error Log Version: 1
ATA Error Count: 574 (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 574 occurred at disk power-on lifetime: 7419 hours (309 days + 3 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
  -- -- -- -- -- -- -- --  ----------------  --------------------
  25 00 48 ff ff ff ef 00  37d+06:30:50.798  READ DMA EXT
  27 00 00 00 00 00 e0 00  37d+06:30:50.797  READ NATIVE MAX ADDRESS EXT
  ec 00 00 00 00 00 a0 00  37d+06:30:50.789  IDENTIFY DEVICE
  ef 03 46 00 00 00 a0 00  37d+06:30:50.785  SET FEATURES [Set transfer mode]
  27 00 00 00 00 00 e0 00  37d+06:30:50.761  READ NATIVE MAX ADDRESS EXT

Error 573 occurred at disk power-on lifetime: 7419 hours (309 days + 3 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
  -- -- -- -- -- -- -- --  ----------------  --------------------
  25 00 48 ff ff ff ef 00  37d+06:30:45.100  READ DMA EXT
  27 00 00 00 00 00 e0 00  37d+06:30:45.100  READ NATIVE MAX ADDRESS EXT
  ec 00 00 00 00 00 a0 00  37d+06:30:45.093  IDENTIFY DEVICE
  ef 03 46 00 00 00 a0 00  37d+06:30:45.046  SET FEATURES [Set transfer mode]
  27 00 00 00 00 00 e0 00  37d+06:30:44.952  READ NATIVE MAX ADDRESS EXT

Error 572 occurred at disk power-on lifetime: 7419 hours (309 days + 3 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
  -- -- -- -- -- -- -- --  ----------------  --------------------
  25 00 48 ff ff ff ef 00  37d+06:30:37.990  READ DMA EXT
  25 00 08 ff ff ff ef 00  37d+06:30:37.983  READ DMA EXT
  25 00 10 ff ff ff ef 00  37d+06:30:37.921  READ DMA EXT
  25 00 08 ff ff ff ef 00  37d+06:30:37.909  READ DMA EXT
  25 00 08 ff ff ff ef 00  37d+06:30:37.882  READ DMA EXT

Error 571 occurred at disk power-on lifetime: 6784 hours (282 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 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
  -- -- -- -- -- -- -- --  ----------------  --------------------
  25 00 00 ff ff ff ef 00  10d+19:40:33.223  READ DMA EXT
  27 00 00 00 00 00 e0 00  10d+19:40:33.222  READ NATIVE MAX ADDRESS EXT
  ec 00 00 00 00 00 a0 00  10d+19:40:33.214  IDENTIFY DEVICE
  ef 03 46 00 00 00 a0 00  10d+19:40:33.207  SET FEATURES [Set transfer mode]
  27 00 00 00 00 00 e0 00  10d+19:40:33.182  READ NATIVE MAX ADDRESS EXT

Error 570 occurred at disk power-on lifetime: 6784 hours (282 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 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
  -- -- -- -- -- -- -- --  ----------------  --------------------
  25 00 00 ff ff ff ef 00  10d+19:40:30.298  READ DMA EXT
  27 00 00 00 00 00 e0 00  10d+19:40:30.297  READ NATIVE MAX ADDRESS EXT
  ec 00 00 00 00 00 a0 00  10d+19:40:30.289  IDENTIFY DEVICE
  ef 03 46 00 00 00 a0 00  10d+19:40:30.281  SET FEATURES [Set transfer mode]
  27 00 00 00 00 00 e0 00  10d+19:40:30.257  READ NATIVE MAX ADDRESS EXT

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Extended offline    Completed: read failure       90%      9634         231252752
# 2  Short offline       Completed without error       00%      3448         -
# 3  Short offline       Completed without error       00%      3436         -
# 4  Short offline       Completed without error       00%      3436         -
# 5  Short offline       Completed without error       00%        17         -
# 6  Short offline       Completed without error       00%         5         -
# 7  Short offline       Completed without error       00%         5         -
# 8  Short offline       Completed without error       00%         4         -
# 9  Extended offline    Completed without error       00%         3         -

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.

Posted in hardware, Linux.


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