Study of 40,000 drives shows which 5 SMART stats indicate an impending drive fai


nickcardwell

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Everyone of the five actually means the drive has already failed, not impending.

 

 

    SMART 5 – Reallocated_Sector_Count.  <-- Reallocated because the original sector failed to record data.

    SMART 187 – Reported_Uncorrectable_Errors. <-- Reported Error, read data but failed to correct using ECC.

    SMART 188 – Command_Timeout. <-- command failed due to execution time.

    SMART 197 – Current_Pending_Sector_Count.  <-- Failed to read data from a sector.

    SMART 198 – Offline_Uncorrectable. <-- Failed to read/write data.

 

If these change on a production system, the drive is replaced, RMA'd and shredded.

 

It's kind of like those days when you were forced to accept a LCD panel with X defects. The only accepted X is zero.

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