How to break volume restriction password ZEN XFI 2 ?

Boot the ZVM into Recovery Mode and select Cleanup from the menu. This will reset any user defined settings, including the passwords.
To boot the player into Recovery Mode, do the following:

1. Insert a paperclip, earring stud, or other slender, unbreakable item into the reset hole located at the bottom of the player to press the reset button inside. You should feel a "click" when you've pressed the button. Press and hold the reset button.
2. While holding the reset button, slide the power switch toward the power icon and hold it there. Let go of the reset button.
3. When the Zen bootscreen appears, release the power switch.