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On 12/11/2015 11:01 AM, P. Remek wrote:

Here is my config:

root@os-node1:~# cat /etc/mdadm/mdadm.conf

DEVICE /dev/mapper/hgst-ssd*
CREATE owner=root group=disk mode=0660 auto=yes
HOMEHOST <system>
MAILADDR root
ARRAY /dev/md0 metadata=0.90 UUID=4472a74f:ca206897:3b82bcad:daeae9f9

It's likely that the udev rules that drive incremental assembly don't
have the mapper aliases at the moment they run.  Try:

DEVICE /dev/dm*

Phil