SUPER MICRO Computer X6DHT-G - Manual (Page 73)

Chapter 4: BIOS
4-19
Fixed Disk Boot Sector
This setting may offer some protection against viruses when set to Write
Protect, which protects the boot sector on the hard drive from having a
virus written to it. The other option is Normal.
Password on Boot
This setting allows you to require a password to be entered when the
system boots up. The options are Enabled (password required) and
Disabled (password not required).