Richard Scobie said:     (by the date of Fri, 09 Nov 2007 10:32:08 +1300)

This was the bug I was thinking of:

http://marc.info/?l=linux-raid&m=116003247912732&w=2

This bug says that it only with mdadm 1.x:

   "If a drive is added to a raid1 using older tools
    (mdadm-1.x or raidtools) then it will be included
    in the array without any resync happening."

But I have here:

# mdadm --version
mdadm - v2.5.6 - 9 November 2006

maybe I stumbled on another bug?

-- 
Janek Kozicki                                                         |