When you have a chance to manage Dell devices that have iDRAC port interface. You will try to access iDRAC OOB (out-of-band) via web interface then setup new password for user root (default username is root).
But how about when you forgot the password default of user root iDRAC ? I will list this information for you :
Default username/password for iDRAC OOB
User : root
Password : calvin
I hope that you see useful. Thank you.