what's incorrect/missing in that procedure? how do i get the full partitions to be used by the array?Did you try without specifying "--raid-devices" there?
yep. different error mdadm --grow /dev/md2 --raid-devices=4 --size=max --force Change size first, then check data is intact before making other changes. mdadm --grow /dev/md2 --size=max --force mdadm: Cannot set device size for /dev/md2: Invalid argument
