Comment 27 for bug 27037

@vk: cat /proc/mdstat indicated a different array - one that I did not build. It must have build it automatically (md_d1). Upon deleting this "other" array (md_d1), i was able to build a new array. It seems as if mdadm tried to build a broken array from one of the disks that still had the previous raid settings, which would explain why that one drive was unable to be used.

Hope that helps
-Dusty