Re: Subject: RFC: Read repair for md RAID1 after mirror read failures

On Fri, Jul 17, 2026 at 1:42 AM G.W. Kant - Hunenet B.V.
<[email protected]> wrote:
>
> On 7/15/26 8:04 PM, Abd-Alrhman Masalkhi wrote:
> > On Wed, Jul 15, 2026 at 19:41 +0200, Abd-Alrhman Masalkhi wrote:
> >> Hi Dion,
> >>
> >
> > I'm not entirely sure about the media refresh part on modern drives...,
> > I'll have to look into that first.
> >
>
> Maybe, we could ask the smartmontools people about this. They should
> know this. But I have never read about a refresh action in their
> documentation.
>
> Best regards,
>
> Dion

I am not sure why you believe the smartmontools people would have ANY
idea about the refresh action.  Smartmontools simply exposes the
internal drive counters that the drive manufacturer exposes and/or
documents.

The refresh action is 100% entirely controlled by the drive's firmware
and has nothing to do with the smartmontools, and the smart counters
may not show any of the internal ECC forced rewrites.

As far as I can tell in general the drive does what it wants to
(refresh or not, relocation bad sectors or not) and there is NO way
that I have ever found to force the firmware do do something else.