Jukka Marin writes:

>Components:
>          component0: failed
>	             /dev/wd5e: optimal
>No spares.
>component0 status is: failed.  Skipping label.
>
>If I try to 'raidctl -R /dev/wd4e raid0' as suggested by the raidctl manpage,
>I get
>
>raidctl: /dev/wd4e is not a component of this device

I think there was a bug in 1.5 (dunno if it is fixed in 1.5.2)
where you had to explicitly initialize the component label (i.e.,
the serial number wasn't written on it or sth.) before copyback.
You might search the mailing list archives for it.

--mkb