Thank you for taking the time to report this bug and helping to make
Ubuntu better. You reported this bug a while ago and there hasn't been
any activity in it recently. We were wondering if this is still an issue
for you. Can you try with the latest Ubuntu release? Thanks in advance.
** Changed
Well, the issue filed here, is
autocreated mdadm.conf prevents autodetection of cold- and hotplugging.
I found out not only the ARRAY lines, but also the homehost prevents
autotection of arrays.
The homehost feature may have been good to prevent systems with global
mdadm --assemble --scan
