> Now the devices have all two superblocks, the one left from the first try > which are now kinda orphaned and those now active. > Can I trust mdadm to handle this properly on its own? I'm not sure what "properly" means. you should not leave around 0xfd partitions with bogus superblocks, since MD will certainly try to assemble them. I don't know offhand how it decides which components to make into a single array (UUID?), but why screw around? for "orphan" partitions, either change the partition type or zero the superblock or both... - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html