> > 1) Read and write errors should be retried at least once before kicking
> > the drive out of the array.
>
> This doesn't seem unreasonable on the face of it.
Device level retries are the job of the device level driver
> > 2) On more persistent read errors, the failed block (or whatever unit is
>
> Generally, it is a good idea to try to rewrite (assuming the original data
> can be recovered via another method) as sector. If we were really good, we
> would run a short (changing random) pattern test on the sector before the
> rewrite to determine whether sparing would be a good idea. Micro defects or
Twenty years ago maybe. Nowdays your drive does all that for you and a
rewrite will cause a block realloc from the spare list
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