On 02/23/12 02:57, John Robinson wrote:

On 22/02/2012 23:16, Jes Sorensen wrote:
[...]

quoted

The goal was to try and reduce the number of bug reports over this by
making it more obvious/explicit, so if you have a suggestion for how to
do so in a better way, I am all game.

How about:

mdadm /dev/md0 --add %s
: %s was already a member of /dev/md0, attempting re-add
: Re-add failed because <reason>
: Not performing add as that would zero the superblock on %s and make it
a spare
: mdadm --add used to do that automatically but it was potentially
dangerous
: If that is what you really want to do, use mdadm --zero-superblock %s
first.

This would get my vote, way better than my messy attempt.

Cheers,
Jes