re: raidctl -B syntax

[matthew green <mrg%eterna.com.au@localhost>]

> I am confident that an I/O error duing reconstruction will result in the
> reconstruction failing.

it does for RAID1.  i've not used RAID5 for years.

i had a disk failure, followed by the otherside giving read
errors while reconstructing.  my rebuild failed sort of
appropriately (it would be nice if the re-rebuild would know
where to restart from.)

(i managed to recover the failed blocks from the 2nd disk
from the 1st one.  at least they managed to fail in different
regions of the dis, obviating the need for more annoying
methods of restore :-)


.mrg.