Apparently conflicting smartctl output

Chuck Swiger cswiger at
Thu Jan 5 19:56:54 UTC 2012

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).


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