MSI Axis 700 User Manual page 45

1st Boot Device/2nd Boot Device/3rd Boot Device
These items allow you to set the sequence of boot devices where
BIOS attempts to load the disk operating system.
Boot Other Device
Setting the option to [Enabled] allows the system to try to boot from
other device if the system fails to boot from the 1st/2nd/3rd boot device.
Hard Disk Boot Priority
Press [Enter] to enter a sub menu which shows every current hard drive
installed. Use [PageUp] or [PageDown] key to select the first boot hard disk.
BIOS Setup
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