Cisco Systems UCSCPCIEBTG, 57712 manual 236

BIOS Parameters by Server Model

Advanced BIOS Parameters for C420 Servers

Name	Description
Number of Enabled Cores	Allows you to disable one or more of the physical cores on the
	server. This can be one of the following:
	• All—Enables all physical cores. This also enables Hyper
		Threading on the associated logical processor cores.
	• 1 through n—Specifies the number of physical processor
		cores that can run on the server. Each physical core has
		an associated logical core.
		To disable Hyper Threading and have only one logical
		processor core running on the server, select 1.
	We recommend that you contact your operating system vendor
	to make sure the operating system supports this feature.
Execute Disable	Classifies memory areas on the server to specify where
	application code can execute. As a result of this classification,
	the processor disables code execution if a malicious worm
	attempts to insert code in the buffer. This setting helps to prevent
	damage, worm propagation, and certain classes of malicious
	buffer overflow attacks. This can be one of the following:
	• Disabled—The processor does not classify memory areas.
	• Enabled—The processor classifies memory areas.
	We recommend that you contact your operating system vendor
	to make sure the operating system supports this feature.
Intel VT	Whether the processor uses Intel Virtualization Technology
	(VT), which allows a platform to run multiple operating systems
	and applications in independent partitions. This can be one of
	the following:
	• Disabled—The processor does not permit virtualization.
	• Enabled—The processor allows multiple operating
		systems in independent partitions.
	Note	If you change this option, you must power cycle the
		server before the setting takes effect.
Intel VT-d	Whether the processor uses Intel Virtualization Technology for
	Directed I/O (VT-d). This can be one of the following:

• Disabled—The processor does not use virtualization technology.

• Enabled—The processor uses virtualization technology.

	Cisco UCS C-Series Servers Integrated Management Controller CLI Configuration Guide, Release 1.5
236	OL-28893-01