SMART - Understanding Offline Data Collection The 2019 Stack Overflow Developer Survey Results Are InDo SSDs support SMART?SMART warns me but I don't trust itSkipping scheduled self-tests and predicting drive EOLCollect smart hard disk dataInexplicably slow Western Digital WD15EARS diskPossible to reset SMART logs?How reliable is HDD SMART data?PERC H710p SMART dataSMART short offline test never ends for all drives of a RAID1SMART attribute 231 mystery: Mushkin SSD

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SMART - Understanding Offline Data Collection



The 2019 Stack Overflow Developer Survey Results Are InDo SSDs support SMART?SMART warns me but I don't trust itSkipping scheduled self-tests and predicting drive EOLCollect smart hard disk dataInexplicably slow Western Digital WD15EARS diskPossible to reset SMART logs?How reliable is HDD SMART data?PERC H710p SMART dataSMART short offline test never ends for all drives of a RAID1SMART attribute 231 mystery: Mushkin SSD



.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty height:90px;width:728px;box-sizing:border-box;








1















I have two Kingston A400 120GB SSD as cache in a Synology NAS, which don't seem to support automatic offline data collection.



# smartctl -d sat -c /dev/sdc | grep -i "Auto Offline data collection" 
Auto Offline Data Collection: Disabled. 
No Auto Offline data collection support.
# smartctl -d sat -o on /dev/sdc
SMART Automatic Timers not supported
SMART Enable Automatic Offline failed: scsi error aborted command


Yet when I check the attributes marked as "Offline", the RAW_VALUE one of them keeps changing (specifically 246 Total_Erase_Count), even if I dont run the manual offline data collection or self-tests in between. I checked if smartd was running just in case, but it isn't. Same thing happens with the other identical SSD.



Questions:



  1. What exactly does the offline data collection update? Does it just update the VALUE/WORST/THRESH columns in the attribute table?

  2. Do short or long self-tests update the SMART attribute data?

Output of smartctl -a:



=== START OF INFORMATION SECTION ===
Model Family: Phison Driven SSDs
Device Model: KINGSTON SA400S37120G
Serial Number: [...]
LU WWN Device Id: [...]
Firmware Version: 03070009
User Capacity: 120,034,123,776 bytes [120 GB]
Sector Size: 512 bytes logical/physical
Rotation Rate: Solid State Device
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-3 T13/2161-D revision 4
SATA Version is: SATA 3.2, 6.0 Gb/s (current: 1.5 Gb/s)
Local Time is: Fri Apr 12 01:55:30 2019 -03
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: (0x02) Offline data collection activity
 was completed without error.
 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: ( 0) seconds.
Offline data collection
capabilities: (0x35) SMART execute Offline immediate.
 No Auto Offline data collection support.
 Abort Offline collection upon new
 command.
 No Offline surface scan supported.
 Self-test supported.
 Conveyance Self-test supported.
 No Selective Self-test supported.
SMART capabilities: (0x0002) Does not save SMART data before
 entering power-saving mode.
 Supports SMART auto save timer.
Error logging capability: (0x00) Error logging NOT supported.
 General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 1) minutes.
Extended self-test routine
recommended polling time: ( 1) minutes.
Conveyance self-test routine
recommended polling time: ( 1) minutes.

SMART Attributes Data Structure revision number: 5
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
 1 Raw_Read_Error_Rate 0x0032 100 100 000 Old_age Always - 0
 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 710
 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 5
148 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 0
149 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 0
167 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 0
168 SATA_Phy_Error_Count 0x0012 100 100 000 Old_age Always - 0
169 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 65
170 Bad_Blk_Ct_Erl/Lat 0x0000 100 100 010 Old_age Offline - 0/78
172 Unknown_Attribute 0x0032 100 100 000 Old_age Always - 0
173 MaxAvgErase_Ct 0x0000 100 100 000 Old_age Offline - 0
181 Program_Fail_Cnt_Total 0x0032 100 100 000 Old_age Always - 0
182 Erase_Fail_Count_Total 0x0000 100 100 000 Old_age Offline - 0
187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0
192 Unsafe_Shutdown_Count 0x0012 100 100 000 Old_age Always - 1
194 Temperature_Celsius 0x0022 024 025 000 Old_age Always - 24 (Min/Max 24/25)
196 Not_In_Use 0x0032 100 100 000 Old_age Always - 0
199 CRC_Error_Count 0x0032 100 100 000 Old_age Always - 0
218 CRC_Error_Count 0x0032 100 100 000 Old_age Always - 4
231 SSD_Life_Left 0x0000 100 100 000 Old_age Offline - 0
233 Flash_Writes_GiB 0x0032 100 100 000 Old_age Always - 396
241 Lifetime_Writes_GiB 0x0032 100 100 000 Old_age Always - 304
242 Lifetime_Reads_GiB 0x0032 100 100 000 Old_age Always - 228
244 Average_Erase_Count 0x0000 100 100 000 Old_age Offline - 2
245 Max_Erase_Count 0x0000 100 100 000 Old_age Offline - 10
246 Total_Erase_Count 0x0000 100 100 000 Old_age Offline - 3827

SMART Error Log not supported

SMART Self-test Log not supported

Selective Self-tests/Logging not supported





ssd synology smart







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    1















    I have two Kingston A400 120GB SSD as cache in a Synology NAS, which don't seem to support automatic offline data collection.



    # smartctl -d sat -c /dev/sdc | grep -i "Auto Offline data collection" 
    Auto Offline Data Collection: Disabled. 
    No Auto Offline data collection support.
    # smartctl -d sat -o on /dev/sdc
    SMART Automatic Timers not supported
    SMART Enable Automatic Offline failed: scsi error aborted command


    Yet when I check the attributes marked as "Offline", the RAW_VALUE one of them keeps changing (specifically 246 Total_Erase_Count), even if I dont run the manual offline data collection or self-tests in between. I checked if smartd was running just in case, but it isn't. Same thing happens with the other identical SSD.



    Questions:



    1. What exactly does the offline data collection update? Does it just update the VALUE/WORST/THRESH columns in the attribute table?

    2. Do short or long self-tests update the SMART attribute data?

    Output of smartctl -a:



    === START OF INFORMATION SECTION ===
    Model Family: Phison Driven SSDs
    Device Model: KINGSTON SA400S37120G
    Serial Number: [...]
    LU WWN Device Id: [...]
    Firmware Version: 03070009
    User Capacity: 120,034,123,776 bytes [120 GB]
    Sector Size: 512 bytes logical/physical
    Rotation Rate: Solid State Device
    Device is: In smartctl database [for details use: -P show]
    ATA Version is: ACS-3 T13/2161-D revision 4
    SATA Version is: SATA 3.2, 6.0 Gb/s (current: 1.5 Gb/s)
    Local Time is: Fri Apr 12 01:55:30 2019 -03
    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: (0x02) Offline data collection activity
     was completed without error.
     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: ( 0) seconds.
    Offline data collection
    capabilities: (0x35) SMART execute Offline immediate.
     No Auto Offline data collection support.
     Abort Offline collection upon new
     command.
     No Offline surface scan supported.
     Self-test supported.
     Conveyance Self-test supported.
     No Selective Self-test supported.
    SMART capabilities: (0x0002) Does not save SMART data before
     entering power-saving mode.
     Supports SMART auto save timer.
    Error logging capability: (0x00) Error logging NOT supported.
     General Purpose Logging supported.
    Short self-test routine
    recommended polling time: ( 1) minutes.
    Extended self-test routine
    recommended polling time: ( 1) minutes.
    Conveyance self-test routine
    recommended polling time: ( 1) minutes.

    SMART Attributes Data Structure revision number: 5
    Vendor Specific SMART Attributes with Thresholds:
    ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
     1 Raw_Read_Error_Rate 0x0032 100 100 000 Old_age Always - 0
     9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 710
     12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 5
    148 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 0
    149 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 0
    167 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 0
    168 SATA_Phy_Error_Count 0x0012 100 100 000 Old_age Always - 0
    169 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 65
    170 Bad_Blk_Ct_Erl/Lat 0x0000 100 100 010 Old_age Offline - 0/78
    172 Unknown_Attribute 0x0032 100 100 000 Old_age Always - 0
    173 MaxAvgErase_Ct 0x0000 100 100 000 Old_age Offline - 0
    181 Program_Fail_Cnt_Total 0x0032 100 100 000 Old_age Always - 0
    182 Erase_Fail_Count_Total 0x0000 100 100 000 Old_age Offline - 0
    187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0
    192 Unsafe_Shutdown_Count 0x0012 100 100 000 Old_age Always - 1
    194 Temperature_Celsius 0x0022 024 025 000 Old_age Always - 24 (Min/Max 24/25)
    196 Not_In_Use 0x0032 100 100 000 Old_age Always - 0
    199 CRC_Error_Count 0x0032 100 100 000 Old_age Always - 0
    218 CRC_Error_Count 0x0032 100 100 000 Old_age Always - 4
    231 SSD_Life_Left 0x0000 100 100 000 Old_age Offline - 0
    233 Flash_Writes_GiB 0x0032 100 100 000 Old_age Always - 396
    241 Lifetime_Writes_GiB 0x0032 100 100 000 Old_age Always - 304
    242 Lifetime_Reads_GiB 0x0032 100 100 000 Old_age Always - 228
    244 Average_Erase_Count 0x0000 100 100 000 Old_age Offline - 2
    245 Max_Erase_Count 0x0000 100 100 000 Old_age Offline - 10
    246 Total_Erase_Count 0x0000 100 100 000 Old_age Offline - 3827

    SMART Error Log not supported

    SMART Self-test Log not supported

    Selective Self-tests/Logging not supported





    ssd synology smart







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      1












      1








      1








      I have two Kingston A400 120GB SSD as cache in a Synology NAS, which don't seem to support automatic offline data collection.



      # smartctl -d sat -c /dev/sdc | grep -i "Auto Offline data collection" 
      Auto Offline Data Collection: Disabled. 
      No Auto Offline data collection support.
      # smartctl -d sat -o on /dev/sdc
      SMART Automatic Timers not supported
      SMART Enable Automatic Offline failed: scsi error aborted command


      Yet when I check the attributes marked as "Offline", the RAW_VALUE one of them keeps changing (specifically 246 Total_Erase_Count), even if I dont run the manual offline data collection or self-tests in between. I checked if smartd was running just in case, but it isn't. Same thing happens with the other identical SSD.



      Questions:



      1. What exactly does the offline data collection update? Does it just update the VALUE/WORST/THRESH columns in the attribute table?

      2. Do short or long self-tests update the SMART attribute data?

      Output of smartctl -a:



      === START OF INFORMATION SECTION ===
      Model Family: Phison Driven SSDs
      Device Model: KINGSTON SA400S37120G
      Serial Number: [...]
      LU WWN Device Id: [...]
      Firmware Version: 03070009
      User Capacity: 120,034,123,776 bytes [120 GB]
      Sector Size: 512 bytes logical/physical
      Rotation Rate: Solid State Device
      Device is: In smartctl database [for details use: -P show]
      ATA Version is: ACS-3 T13/2161-D revision 4
      SATA Version is: SATA 3.2, 6.0 Gb/s (current: 1.5 Gb/s)
      Local Time is: Fri Apr 12 01:55:30 2019 -03
      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: (0x02) Offline data collection activity
       was completed without error.
       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: ( 0) seconds.
      Offline data collection
      capabilities: (0x35) SMART execute Offline immediate.
       No Auto Offline data collection support.
       Abort Offline collection upon new
       command.
       No Offline surface scan supported.
       Self-test supported.
       Conveyance Self-test supported.
       No Selective Self-test supported.
      SMART capabilities: (0x0002) Does not save SMART data before
       entering power-saving mode.
       Supports SMART auto save timer.
      Error logging capability: (0x00) Error logging NOT supported.
       General Purpose Logging supported.
      Short self-test routine
      recommended polling time: ( 1) minutes.
      Extended self-test routine
      recommended polling time: ( 1) minutes.
      Conveyance self-test routine
      recommended polling time: ( 1) minutes.

      SMART Attributes Data Structure revision number: 5
      Vendor Specific SMART Attributes with Thresholds:
      ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
       1 Raw_Read_Error_Rate 0x0032 100 100 000 Old_age Always - 0
       9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 710
       12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 5
      148 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 0
      149 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 0
      167 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 0
      168 SATA_Phy_Error_Count 0x0012 100 100 000 Old_age Always - 0
      169 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 65
      170 Bad_Blk_Ct_Erl/Lat 0x0000 100 100 010 Old_age Offline - 0/78
      172 Unknown_Attribute 0x0032 100 100 000 Old_age Always - 0
      173 MaxAvgErase_Ct 0x0000 100 100 000 Old_age Offline - 0
      181 Program_Fail_Cnt_Total 0x0032 100 100 000 Old_age Always - 0
      182 Erase_Fail_Count_Total 0x0000 100 100 000 Old_age Offline - 0
      187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0
      192 Unsafe_Shutdown_Count 0x0012 100 100 000 Old_age Always - 1
      194 Temperature_Celsius 0x0022 024 025 000 Old_age Always - 24 (Min/Max 24/25)
      196 Not_In_Use 0x0032 100 100 000 Old_age Always - 0
      199 CRC_Error_Count 0x0032 100 100 000 Old_age Always - 0
      218 CRC_Error_Count 0x0032 100 100 000 Old_age Always - 4
      231 SSD_Life_Left 0x0000 100 100 000 Old_age Offline - 0
      233 Flash_Writes_GiB 0x0032 100 100 000 Old_age Always - 396
      241 Lifetime_Writes_GiB 0x0032 100 100 000 Old_age Always - 304
      242 Lifetime_Reads_GiB 0x0032 100 100 000 Old_age Always - 228
      244 Average_Erase_Count 0x0000 100 100 000 Old_age Offline - 2
      245 Max_Erase_Count 0x0000 100 100 000 Old_age Offline - 10
      246 Total_Erase_Count 0x0000 100 100 000 Old_age Offline - 3827

      SMART Error Log not supported

      SMART Self-test Log not supported

      Selective Self-tests/Logging not supported





      ssd synology smart







      share|improve this question









      New contributor




      Bangaio is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.












      I have two Kingston A400 120GB SSD as cache in a Synology NAS, which don't seem to support automatic offline data collection.



      # smartctl -d sat -c /dev/sdc | grep -i "Auto Offline data collection" 
      Auto Offline Data Collection: Disabled. 
      No Auto Offline data collection support.
      # smartctl -d sat -o on /dev/sdc
      SMART Automatic Timers not supported
      SMART Enable Automatic Offline failed: scsi error aborted command


      Yet when I check the attributes marked as "Offline", the RAW_VALUE one of them keeps changing (specifically 246 Total_Erase_Count), even if I dont run the manual offline data collection or self-tests in between. I checked if smartd was running just in case, but it isn't. Same thing happens with the other identical SSD.



      Questions:



      1. What exactly does the offline data collection update? Does it just update the VALUE/WORST/THRESH columns in the attribute table?

      2. Do short or long self-tests update the SMART attribute data?

      Output of smartctl -a:



      === START OF INFORMATION SECTION ===
      Model Family: Phison Driven SSDs
      Device Model: KINGSTON SA400S37120G
      Serial Number: [...]
      LU WWN Device Id: [...]
      Firmware Version: 03070009
      User Capacity: 120,034,123,776 bytes [120 GB]
      Sector Size: 512 bytes logical/physical
      Rotation Rate: Solid State Device
      Device is: In smartctl database [for details use: -P show]
      ATA Version is: ACS-3 T13/2161-D revision 4
      SATA Version is: SATA 3.2, 6.0 Gb/s (current: 1.5 Gb/s)
      Local Time is: Fri Apr 12 01:55:30 2019 -03
      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: (0x02) Offline data collection activity
       was completed without error.
       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: ( 0) seconds.
      Offline data collection
      capabilities: (0x35) SMART execute Offline immediate.
       No Auto Offline data collection support.
       Abort Offline collection upon new
       command.
       No Offline surface scan supported.
       Self-test supported.
       Conveyance Self-test supported.
       No Selective Self-test supported.
      SMART capabilities: (0x0002) Does not save SMART data before
       entering power-saving mode.
       Supports SMART auto save timer.
      Error logging capability: (0x00) Error logging NOT supported.
       General Purpose Logging supported.
      Short self-test routine
      recommended polling time: ( 1) minutes.
      Extended self-test routine
      recommended polling time: ( 1) minutes.
      Conveyance self-test routine
      recommended polling time: ( 1) minutes.

      SMART Attributes Data Structure revision number: 5
      Vendor Specific SMART Attributes with Thresholds:
      ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
       1 Raw_Read_Error_Rate 0x0032 100 100 000 Old_age Always - 0
       9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 710
       12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 5
      148 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 0
      149 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 0
      167 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 0
      168 SATA_Phy_Error_Count 0x0012 100 100 000 Old_age Always - 0
      169 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 65
      170 Bad_Blk_Ct_Erl/Lat 0x0000 100 100 010 Old_age Offline - 0/78
      172 Unknown_Attribute 0x0032 100 100 000 Old_age Always - 0
      173 MaxAvgErase_Ct 0x0000 100 100 000 Old_age Offline - 0
      181 Program_Fail_Cnt_Total 0x0032 100 100 000 Old_age Always - 0
      182 Erase_Fail_Count_Total 0x0000 100 100 000 Old_age Offline - 0
      187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0
      192 Unsafe_Shutdown_Count 0x0012 100 100 000 Old_age Always - 1
      194 Temperature_Celsius 0x0022 024 025 000 Old_age Always - 24 (Min/Max 24/25)
      196 Not_In_Use 0x0032 100 100 000 Old_age Always - 0
      199 CRC_Error_Count 0x0032 100 100 000 Old_age Always - 0
      218 CRC_Error_Count 0x0032 100 100 000 Old_age Always - 4
      231 SSD_Life_Left 0x0000 100 100 000 Old_age Offline - 0
      233 Flash_Writes_GiB 0x0032 100 100 000 Old_age Always - 396
      241 Lifetime_Writes_GiB 0x0032 100 100 000 Old_age Always - 304
      242 Lifetime_Reads_GiB 0x0032 100 100 000 Old_age Always - 228
      244 Average_Erase_Count 0x0000 100 100 000 Old_age Offline - 2
      245 Max_Erase_Count 0x0000 100 100 000 Old_age Offline - 10
      246 Total_Erase_Count 0x0000 100 100 000 Old_age Offline - 3827

      SMART Error Log not supported

      SMART Self-test Log not supported

      Selective Self-tests/Logging not supported





      ssd synology smart




      ssd synology smart






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      edited 26 mins ago









      Sam Martin

      1,3241910




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      asked 3 hours ago









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