Acer AR360 F1 - Manual (Page 126)

4 System BIOS 110
Hard Disk Drives
This feature allows you to specify the boot sequence from all available
hard disk drives. The settings are Disabled and a list of all hard disk
drives that have been detected.
•
1st Drive
• 2nd Drive
• 3rd Drive
CD/DVD Drive
This feature allows you to specify the boot sequence from all available
removable drives.