Dell PowerEdge R660 Installation and Service Manual

Redundant OS Control

To view the Redundant OS Control screen, power on the system, press F2, and click System Setup Main Menu > System BIOS > Redundant OS Control.

Table 1. Redundant OS Control detailsThis table provides the details of the options available on the Redundant OS Control screen.
Option	Description
Redundant OS Location	Enables you to select a backup disk from the following devices: None SATA Ports in AHCI mode BOSS PCIe Cards (Internal M.2 Drives) Internal USB NOTE:RAID configurations and NVMe cards are not included, as BIOS does not have the ability to distinguish between individual drives in those configurations. Internal SD card
Redundant OS State	NOTE:This option is disabled if Redundant OS Location is set to None. When set to Visible, the backup disk is visible to the boot list and OS. When set to Hidden, the backup disk is disabled and is not visible to the boot list and OS. This option is set to Visible by default. NOTE:BIOS disables the device in hardware, so it is not accessed by the OS.
Redundant OS Boot	NOTE:This option is disabled if Redundant OS Location is set to None or if Redundant OS State is set to Hidden. When set to Enabled, BIOS boots to the device specified in Redundant OS Location. When set to Disabled, BIOS preserves the current boot list settings. This option is set to Disabled by default.