SMART

[Ivan Voras]

Thomas Backman wrote:
> On Nov 12, 2009, at 1:25 PM, Ivan Voras wrote:
>> Actually, it would be good if you taught more than him :)
>>
>> I've always wondered how important are each of the dozen or so statistics and what indicates what...
>>
>> Here is for example my desktop drive:
>>
>> 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   087   083   006    Pre-fail Always       -       45398197
>>  3 Spin_Up_Time            0x0003   096   093   000    Pre-fail Always       -       0
>>  4 Start_Stop_Count        0x0032   100   100   020    Old_age Always       -       64
>>  5 Reallocated_Sector_Ct   0x0033   100   100   036    Pre-fail Always       -       0
>>  7 Seek_Error_Rate         0x000f   084   060   030    Pre-fail Always       -       247407473
>>  9 Power_On_Hours          0x0032   089   089   000    Old_age Always       -       10155
>> 10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail Always       -       0
>> 12 Power_Cycle_Count       0x0032   100   100   020    Old_age Always       -       64
>> 187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0
>> 189 High_Fly_Writes         0x003a   100   100   000    Old_age   Always       -       0
>> 190 Airflow_Temperature_Cel 0x0022   058   055   045    Old_age   Always       -       42 (Lifetime Min/Max 37/44)
>> 194 Temperature_Celsius     0x0022   042   045   000    Old_age   Always       -       42 (0 20 0 0)
>> 195 Hardware_ECC_Recovered  0x001a   062   059   000    Old_age   Always       -       45398197
>> 197 Current_Pending_Sector  0x0012   100   100   000    Old_age   Always       -       0
>> 198 Offline_Uncorrectable   0x0010   100   100   000    Old_age Offline      -       0
>> 199 UDMA_CRC_Error_Count    0x003e   200   200   000    Old_age   Always       -       0
>> 200 Multi_Zone_Error_Rate   0x0000   100   253   000    Old_age Offline      -       0
>> 202 TA_Increase_Count       0x0032   100   253   000    Old_age   Always       -       0
>>
>> I see many values exceeding threshold but since I see it so often on other drives I don't know what the threshold is for.
> None of the your values are exceeding the threshold - it works backwards. If the value is LOWER than the threshold, you might be in trouble.

Good to know.

> Also, judging by the raw read error rate, seek error rate and hardward ECC recovered, allow me to guess that this is a Seagate drive. :-)
> (Seagate drives, perhaps among others, use these raw values way differently than others. My Hitachi 7K1000.B has 0 on those.)

Yes, it's Seagate. Statistically I have the least problems with their 
drives. But I imagine that lack of standardization about these 
statistics very much limits the usability of SMART, right?