System maintenance switch

Position	Default	Function
S1	Off	Off = iLO 4 security is enabled. On = iLO 4 security is disabled.
S2	Off	Off = System configuration can be changed. On = System configuration is locked.
S3	Off	Reserved
S4	Off	Reserved
S5	Off	Off = Power-on password is enabled. On = Power-on password is disabled.
S6	Off	Off = No function On = ROM reads system configuration as invalid.
S7	Off	Off = Set default boot mode to UEFI. On = Set default boot mode to legacy.
S8	—	Reserved
S9	—	Reserved
S10	—	Reserved
S11	—	Reserved
S12	—	Reserved

To access the redundant ROM, set S1, S5, and S6 to On.

When the system maintenance S6 switch is set to the On position, the system will erase all system configuration settings from both CMOS and NVRAM on the next reboot.

CAUTION: Clearing CMOS and/or NVRAM deletes configuration information. Be sure to properly configure the server or data loss could occur.

Before using the S7 switch to change the boot mode to Legacy BIOS Mode, you must first disable the Dynamic Smart Array B140i Controller.

To disable the Dynamic Smart Array B140i Controller:

1. Reboot the server.

   The server restarts and the POST screen appears.

2. Press F9.

   The System Utilities screen appears.

3. Select System Configuration ® BIOS/Platform Configuration (RBSU) ® System Options ® SATA Controller Options ® Embedded SATA Configuration, and then press Enter.
4. Select Enable SATA AHCI Support, and then press Enter.
5. Press F10 to save the selection.
6. Press Y to save the changes.

   The Change saved confirmation prompt appears.

7. Select Exit and resume system boot, and press Enter.

   The server continues the normal boot process.