RAIDframe and bad blocks

[Emmanuel Dreyfus <manu%netbsd.org@localhost>]

Hello

Consider a RAID 1 with wd0 and wd1

wd1 has bad blocks and is marked failed. I replace it and reconstruct
the RAID with a new disk. But wd0 also has bad blocks, and RAIDframe 
will give up reconstruction because of the read failure.

Most likely the relevant blocks are oustide of used space, and could
just be replaced by zeroes, but that needs to be done by cloning
with dd conv=noerror,sync, with the RAID offline. 

Perhaps we could come up with a better RAIDframe behavior on
reconstruction with read errors?


-- 
Emmanuel Dreyfus
manu%netbsd.org@localhost