Richard Scobie said:     (by the date of Thu, 08 Nov 2007 08:13:19 +1300)

What kernel and RAID level is this?

If it's RAID 1, I seem to recall there was a relatively recently fixed 
bug for this.

debian etch, stock install
Linux 2.6.18-5-k7 #1 SMP i686 GNU/Linux

The problem was with was RAID 5.

But also I have RAID 1 there, and after --add the drives
automatically resynced.

-- 
Janek Kozicki                                                         |