[mythtv-users] Hard Drive Problems

David Brieck Jr. dbrieck at gmail.com
Tue May 1 13:40:43 UTC 2012


On Tue, May 1, 2012 at 9:32 AM, John Drescher <drescherjm at gmail.com> wrote:
>> The drive that you show the SMART data could be dieing or this could
>> be an isolated media defect. SMART attribute 197 and 198 should be
>> close to 0. Both of these represent what some call drive amnesia. The
>> drive wrote data that it no longer can read.
>
> BTW, one way to tell if this is an isolated media defect or real
> problem with the heads is to copy your data to a new disk (possibly
> using ddrescue) and then run a 4 pattern badblocks read / write test
> on the drive. If you see any bad sectors reported repeat the test if
> the second time you see any badblocks reported I would call the
> drive..
>
> badblocks -wsv /dev/mydrive
>
> remember to copy the data first as this will wipe the disk.
>
>
>
> --
> John M. Drescher

Thanks for the response John.

I've checked the SMART data infrequently so I don't have a real point
of reference for when it could have started showing signs of a
problem. This isn't the first time I've lost drives on myth dedicated
systems in the past, but it's the first time two seem to be showing
problems at once.

The only other drive I've ever lost that was still under warranty was
an IBM DeathStar.

Here's the SMART data for the drive you're thinking has file system corruption:

ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE
UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x000f   200   200   051    Pre-fail
Always       -       601
  3 Spin_Up_Time            0x0003   180   180   021    Pre-fail
Always       -       7991
  4 Start_Stop_Count        0x0032   100   100   000    Old_age
Always       -       76
  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail
Always       -       0
  7 Seek_Error_Rate         0x000e   200   200   051    Old_age
Always       -       0
  9 Power_On_Hours          0x0032   048   048   000    Old_age
Always       -       38625
 10 Spin_Retry_Count        0x0012   100   253   051    Old_age
Always       -       0
 11 Calibration_Retry_Count 0x0012   100   253   051    Old_age
Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age
Always       -       74
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age
Always       -       101
193 Load_Cycle_Count        0x0032   001   001   000    Old_age
Always       -       649774
194 Temperature_Celsius     0x0022   119   099   000    Old_age
Always       -       33
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age
Always       -       0
197 Current_Pending_Sector  0x0012   200   200   000    Old_age
Always       -       0
198 Offline_Uncorrectable   0x0010   200   200   000    Old_age
Offline      -       0
199 UDMA_CRC_Error_Count    0x003e   200   200   000    Old_age
Always       -       0
200 Multi_Zone_Error_Rate   0x0008   200   200   051    Old_age
Offline      -       19

I'm tempted to try the ddrescue command, but the SMART data isn't
showing any bad sectors.


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