Cisco Systems 57712, UCSCPCIEBTG manual System removes that device type from the boot order

BIOS Parameters by Server Model

Server Management BIOS Parameters for C220 and C240 Servers

Name	Description
Boot Order Rules	How the server changes the boot order list defined through the
	CIMC GUI or CLI when there are no devices of a particular
	device type available or when the user defines a different boot
	order using the server's BIOS Setup Utility.
	The supported device types are:
	• HDD—Hard disk drive
	• FDD—Floppy disk drive
	• CDROM—Bootable CD-ROM or DVD
	• PXE—PXE boot
	• EFI—Extensible Firmware Interface
	The Boot Order Rules option can be one of the following:
	• Strict—When no devices of a particular type are available,
	the system creates a placeholder for that device type in the
	boot order list. When a device of that type becomes
	available, it is added to the boot order in the previously
	defined position.
	If the user defines a boot order through the server's BIOS
	Setup Utility, that boot order is given priority over the
	boot order configured through the CIMC GUI or CLI. All
	device types defined through CIMC that are not present
	in the boot order defined through the BIOS Setup Utility
	are removed from the boot order list.
	• Loose—When no devices of a particular type are available,
	the system removes that device type from the boot order.
	When a device of that type becomes available, the system
	adds it to the end of the boot order list.
	If the boot order is configured through the server's BIOS
	Setup Utility, that boot order is given priority over the
	boot order configured through the CIMC GUI or CLI. All
	device types defined through CIMC that are not present
	in the boot order defined through the BIOS Setup Utility
	are moved to the end of the boot order list.

Cisco UCS C-Series Servers Integrated Management Controller CLI Configuration Guide, Release 1.5

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