Dell EMC PowerEdge M640 Installation and Service Manual

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Redundant OS Control screen details

The Redundant OS Control screen details are explained as follows:

About this task

Option
Description
Redundant OS Location
Enables you to select a backup disk from the following devices:
  • None
  • IDSDM
  • SATA Ports in AHCI mode
  • BOSS PCIe Cards (Internal M.2 Drives)
  • Internal USB
  • NOTE: RAID configurations and NVMe cards not are included as BIOS does not have the ability to distinguish between individual drives in those configurations.
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 will disable the device in hardware, so it cannot be 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 Enabled by default.

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