SMART

[Ivan Voras]

Jeremy Chadwick wrote:

> I can teach you how to decode/read SMART statistics correctly.
> 

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.