Today, connected via ssh user naroot BMC console I have reinstalled ontap with option 4a
(4) Initialize owned disks (xx disks are owned by this filer).
(4a) Same as option 4, but create a flexible root volume.
Netapp is not connected to network so I gave some dummy IP addresses and when everything was completed I have finished my ssh session.
What I didn't pay attention to is that NetApp didn't ask me about any new (or old) root password, and I was sure that since I didn't change any settings, BMC naroot password will stay the same. Unforunately now I cannot login with my password. Is there any 'default' password in such cases used?