Smart shouldn't be used for this, the sata transport layer should be updated to allow indicating it, syscalls should pass this information along, so filesystems

Smart shouldn't be used for this, the sata transport layer should be updated to allow indicating it, syscalls should pass this information along, so filesystems can react to it.. otherwise we'd need a new smart field, as the semantics of the existing fields are insufficiently described, and reacting to them would require adding a smart-query to every filesystem call that touches disk. thing is, "iffy" depends on what firmware decides is iffy.. Maybe a firmware relocates a sector the very first time it fails to read, maybe it relocates after try 200. What we want is to be notified, when we request a sector, if reading it was 100% painless. Depending on your demands for reliability, maybe it's okay to re-read a sector a few times, and still not reallocate it, but maybe your filesystem would like to gather these stats from the disks anyway.