Comment 32 for bug 136252

I think on hotplug systems mdadm.conf should generally not contain any specific ARRAY references, maybe it should explicity mention "any" like this:?

DEVICE <any>
ARRAY <any>

This whole bussiness of locking down array assembly (homehost,ARRAY) may just be due to the historical (suboptimal) mdadm design to assamble raids going by major/minor numbers saved in the superblocks. Those should always be considered being dynamic(depreciated). Using --assemble --uuid mdadm takes a UUID and match this unique but same UUID on all member devices.

Of course we should refrain from running arrays that are not complete (avoid leading them to desync by subsequent writes), unless we are required to recover data from a specific failed array and --run it manually or by a startup script.