feature re-quest for "re-write"

Hi,

we have "check", "repair", "replacement" and other operations on raid 
volumes.

I am not a programmer, but I was wondering how much work it would require 
to take current code and implement "rewrite", basically re-writing every 
block in the md raid level. Since "repair" and "check" doesn't seem to 
properly detect a few errors, wouldn't it make sense to try least 
existance / easiest implementation route to just re-write all data on the 
entire array? If reads fail, re-calculate from parity, if reads work, just 
write again.

The goal of this new mode would be to eradicate pending sectors by 
re-writing everything on the drive.

If this doesn't seem like a sensible approach, what would be a sensible 
approach to avoid having pending sectors keep being "pending" even after 
"check" and "repair"?

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se