Asus P7F-C/SAS - Manual (Page 42)

2-24 Chapter 2: Hardware information
7. Force BIOS recovery setting (3-pin RECOVERY1)
This jumper allows you to quickly update or recover the BIOS settings when it
becomes corrupted.
To update the BIOS:
1. Set the jumper to pins 2–3.
2. Insert the USB flash that contains the original or latest BIOS and turn on
the system to recover or update the BIOS.
3. Shut down the system.
4. Set the jumper back to pins 1–2.
5. Turn on the system.
6. Onboard storage setting (3-pin SAS_SW1) (P7F-C/SAS model only)
This jumper allows you to enable or disable the onboard LSI1068E SAS
controller. Set the jumper to pins 1–2 to enable the SAS function (default).