Apparently conflicting smartctl output

Bas Smeelen b.smeelen at
Fri Jan 6 06:52:55 UTC 2012

On 01/05/2012 08:56 PM, Chuck Swiger wrote:
> On Jan 5, 2012, at 11:42 AM, Janos Dohanics wrote:
>> - Do I have a bad hard drive (apparently, I do...)
>> - Why are there "No Errors Logged" by smartctl?
> You've probably got a bad sector on the drive, anyway.
> The SMART error log is a funny thing governed by various drive's firmware which have quirks.  Some of 'em only have a self-test log, but don't store the error log at all; others will only record an error after they've given up trying to remap a failing sector.  You snipped too much of the smartctl output to see what the "Error logging capability" section says-- the full output would be more informative.
> You almost certainly want to do a full read-scan of the drive via "dd if=/dev/ad4 of=/dev/null bs=64k", which will help the drive notice any other failing sectors.  Repeat dd if it aborts early with an error (or add "conv=noerror", maybe).
> Regards,


I have had this with a drive and multiple read errors would not remap the
With write errors the sector would be remapped. This was a new Samsung
laptop drive though, not a Western Digital.
To get the sector remapped I had to fully write the drive and it was ok
after that.
For now no bad sectors have been showing up


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