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Disk Utility may not warn of a failing hard drive
Authored by: stepwallace on Sep 30, '10 06:39:53PM

Disk Utility is correctly reporting the SMART status, it's just not reporting the number of bad blocks.

Drive manufacturers set a maximum acceptable number for each measured trait of the drive before a drive will report a SMART issue. A couple of bad blocks is considered normal over the lifetime of a drive, so it won't flag as failed. Once that count has gone over what the manufacturer has determined as the maximum acceptable limit, that's the point where the drive will report as failing in SMART status.

If you open up SMART reporter, you can see the thresholds listed, and the point at which it would fail.

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Disk Utility may not warn of a failing hard drive
Authored by: adrian.nier on Oct 01, '10 09:00:41AM
Seems to me that some of the values displayed by SMARTReporter are long past their thresholds:

ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x000f   100   064   046    Pre-fail  Always       -       222065
  2 Throughput_Performance  0x0005   100   100   030    Pre-fail  Offline      -       19267584
  3 Spin_Up_Time            0x0003   100   100   025    Pre-fail  Always       -       1
  4 Start_Stop_Count        0x0032   099   099   000    Old_age   Always       -       5083
  5 Reallocated_Sector_Ct   0x0033   095   095   024    Pre-fail  Always       -       127 (1875, 125)
  7 Seek_Error_Rate         0x000f   100   100   047    Pre-fail  Always       -       3301
  8 Seek_Time_Performance   0x0005   100   100   019    Pre-fail  Offline      -       0
  9 Power_On_Hours          0x0032   085   085   000    Old_age   Always       -       7942
 10 Spin_Retry_Count        0x0013   100   100   020    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       3196
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       201
193 Load_Cycle_Count        0x0032   080   080   000    Old_age   Always       -       410036
194 Temperature_Celsius     0x0022   100   100   000    Old_age   Always       -       26 (Lifetime Min/Max 9/48)
195 Hardware_ECC_Recovered  0x001a   100   100   000    Old_age   Always       -       301
196 Reallocated_Event_Count 0x0032   095   095   000    Old_age   Always       -       127 (14, 6827)
197 Current_Pending_Sector  0x0012   091   091   000    Old_age   Always       -       10
198 Offline_Uncorrectable   0x0010   067   067   000    Old_age   Offline      -       67
199 UDMA_CRC_Error_Count    0x003e   200   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x000f   100   100   060    Pre-fail  Always       -       2063
203 Run_Out_Cancel          0x0002   100   100   000    Old_age   Always       -       433762336302
240 Head_Flying_Hours       0x003e   200   200   000    Old_age   Always       -       0


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