A tool for remapping bad sectors in CURRENT?

[Alexander Motin]

Eugeny N Dzhurinsky wrote:
> Recently I've started to see the following logs in messages:
> 
> Mar  8 12:00:24 localhost smartd[795]: Device: /dev/ad4, 2 Currently unreadable (pending) sectors
> Mar  8 12:00:24 localhost smartd[795]: Device: /dev/ad4, 2 Offline uncorrectable sectors
> 
> smartctl did really show that something is wrong with my HDD, but still no
> remaps - just read errors.
> 
> SMART Self-test log structure revision number 1
> Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
> # 1  Extended offline    Completed: read failure       60%      1198         222342559
> # 2  Extended offline    Completed: read failure       60%      1187         222342557
> # 3  Extended offline    Completed: read failure       60%      1180         222342559
> # 4  Short offline       Completed without error       00%      1178         -
> # 5  Extended offline    Aborted by host               90%      1178         -
> 
> and
> 
> ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
> ...
> Reallocated_Sector_Ct   0x0033   100   100   036    Pre-fail  Always       -       0
> ...
> 
> Now can I find out which file owns the LBAs 222342557 and 222342559 ? How do I
> force remapping of these sectors? I assume that I have to write something
> directly to the sectors?

You may try to overwrite these sectors with dd. It should trigger sector
reallocation. To be sure, you may read them before and after the write.

-- 
Alexander Motin