Hello again [NAME].ballat,   I have already given them to you in my previous post. But it seems they are not working for you:     1. remove 1 controller and have the serial cable connected to the other controller 2. when you see ### press ctrl and b 3. you will have a menu appear, select 10 for serial interface, 1 for console only then q to quit and r to reboot 4. when the controller has rebooted and you see the lockdown message press enter for console prompt and type LemClearLockdown (note case sensitive) 5. let the controller reboot 6. repeat with the alternative controller, removing the controller you have just worked on 7. insert both controllers and see if MDSN can detect the unit, it may still be marked as needs attention, this is due to being in recovery mode, follow the recovery guru's instructions to clear the recovery mode   That's why I suggest you to open a service request with you local Dell support for a lvl 2 agent fixing the issue. Or even replace the controller.   Regards.    
Hello Everybody  Kindly I need your assistance. I have PowerVault MD3800f and after inserting new disk I got into lockdown. When I connect serial cable and press S I get the following options: 1) Display IP Configuration 2) Display Seven Segment Code  Q) Quit Menu When I use "Display Seven Segment Code" I get the following message: "Dell Controller lockdown with limited use of SYMbol"  Your help is highly appreciated Thank you
PowerVault MD3800f in Lockdown