Question I used "efibootmgr" tool to modify EFI boot order, but after a system reboot, the boot priority modification cannot save. Why and is there an alternative? Answer In order to successfully use efibootmgr, the EFI variables file system must be accessible. This is a problem since efibootmgr cannot access EFI variables due to protection from the chipset as a reaction to prevent security threats. For an alternative, use SUM. Was this FAQ helpful? YES      NO Enter Comments Below: Note: Your comments/feedback should be limited to this FAQ only. For technical support, please send an email to support@supermicro.com.  Enter your email address below if you'd like technical support staff to reply:  Please type the Captcha (no space) T Q K Y FAQ Stats FAQ ID Related Category / Keyword Date Posted Code 27004 Other: - Firmware/BIOS related 12/15/17 Admin     Print Answer