I'm trying to set up a RAID1 array, like this:
djc@miles dev $ sudo mdadm -v --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb1 /dev/sdc1 mdadm: Defaulting to version 1.2 metadata mdadm: RUN_ARRAY failed: Invalid argument
This is with two brand new hard disks and brand new (type 83) partitions (both have a single partition). What could be going wrong here? Google is not offering much help, and I don't really understand the error message here.