Re: [smartmontools-support] strange error

[Christian F. <Chr...@t-...>]

Milos Rajsic wrote:
> I have smart read error in log report on quite young WD black 1TB in
> software raid.
> Do not know what do since the sector is readable by hdparm tool.
> Also tried to use selective test after the logged error and could not
> succeed I always get same error report in log.
>
> Here is smatctl -a report:
> ...
> 197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       1
> 198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      -       1
> ...
>
> SMART Error Log Version: 1
> No Errors Logged

This old error log does only support 28-bit LBA address fields. The disk 
firmware might not add any entry for errors above the 128GiB boundary.


> SMART Self-test log structure revision number 1
> Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
> # 1  Selective offline   Completed: read failure       90%      4421         502093169
> # 2  Short offline       Completed: read failure       90%      4403         502093169

Similar issue for this old self-test log: The field width is 32-bit, but 
it officially only supports 28-bit LBA. Therefore the above (29-bit) LBA 
address might be bogus.

The newer extended logs support 48-bit LBA. Please try:

   smartctl -l xerror -l xselftest ...

or:

   smartctl -x ...


> ...
> # 7  Short offline       Completed: read failure       90%      4343         502093169
> # 8  Conveyance offline  Completed: read failure       90%      4304         502093169
> # 9  Extended offline    Completed: read failure       80%      4296         502093169
> #10  Extended offline    Completed without error       00%      2152         -

It is not uncommon that self-tests are aborted immediately by the 
firmware if a pending sector still exists.

Please check the full disk with some tool. I prefer GNU ddrescue, which 
was also suggested by Alex.

Thanks,
Christian