Confusing smartd messages

[Peter Jeremy]

On 2018-Jul-04 18:05:56 -0700, "Rodney W. Grimes" <freebsd-rwg at pdx.rh.CN85.dnsmgr.net> wrote:
>It would be really nice if we had a way to tell ZFS to
>do the equivelent of:
>	dd if=/dev/ada1 of=/dev/ada1 bs=128k conv=noerror,sync
>in some type of lowlevel scrub operation, with proper locking
>which could easily repair most of these Pending Sector errors,

Agreed.

>It would of also been nice if the ata standard would of made a way
>to get the LBA of pending sectors so that a very quick rewrite attempt
>could be done to fix them.  IIRC this info is avalible, but in a vendor
>specific way.

As a workaround, 
  dd if=/dev/ada1 of=/dev/null bs=128k conv=noerro
will report any errors.  You can then write zeroes or garbage to those
sectors (optionally followed by a scrub if you overwrote more than the
faulty sectors)

-- 
Peter Jeremy
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