Re: Power_On_Hours value is much less then selftest LifeTime(hours)

Is this possibly a refurbished drive ?
If yes, the factory may have reset the SMART attribute table but forgot 
to reset the self-test log.

Please check whether the drive supports Device Statistics (smartctl -l 
devstat, included smartctl -x).


robert at spotswood-computer.net wrote:
> I have vague memories about the attrib raw counters can cycle, e.g. once
> they hit some value, say 9999, the next hour they increment to 0000. Note
> some drives record minutes, not hours in the raw counter.
>
> I would trust the self test log hours more. And this is an old drive by
> those numbers.
>
>> Hello,
>>
>> I've recently bought the "new" HDD Hitachi Ultrastar A7K2000 and found
>> the following in the output of the smartctl (check particularly the
>> Power_On_Hours and LifeTime(hours)):
>>
>> ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE
>> UPDATED  WHEN_FAILED RAW_VALUE
>> ...
>>    4 Start_Stop_Count        0x0012   100   100   000    Old_age
>> Always       -       2
>>    5 Reallocated_Sector_Ct   0x0033   100   100   005    Pre-fail
>> Always       -       0
>>    7 Seek_Error_Rate         0x000b   100   100   067    Pre-fail
>> Always       -       0
>>    8 Seek_Time_Performance   0x0005   100   100   020    Pre-fail
>> Offline      -       0
>>    9 Power_On_Hours          0x0012   100   100   000    Old_age
>> Always       -       45
>> ...
>> SMART Self-test log structure revision number 1
>> Num  Test_Description    Status                  Remaining
>> LifeTime(hours)  LBA_of_first_error
>> # 1  Short offline       Completed without error       00%
>> 36872         -
>> # 2  Short offline       Completed without error       00%
>> 36784         -
>> ...
>>
>> I'd appreciate if somebody could give an explanation of these numbers.
>>
>>
>> Regards,
>> Vlad.
>> ------------------------------------------------------------------------------
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>
> ------------------------------------------------------------------------------
> Mobile security can be enabling, not merely restricting. Employees who
> bring their own devices (BYOD) to work are irked by the imposition of MDM
> restrictions. Mobile Device Manager Plus allows you to control only the
> apps on BYO-devices by containerizing them, leaving personal data untouched!
> https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
> _______________________________________________
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>


------------------------------------------------------------------------------
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j