User's Manual

DescriptionName
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.
Number of Enabled Cores
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.
Execute Disable
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.
If you change this option, you must power cycle the
server before the setting takes effect.
Note
Intel VT
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.
Intel VT-d
Cisco UCS C-Series Servers Integrated Management Controller CLI Configuration Guide, Release 1.5
204 OL-28893-01
BIOS Parameters by Server Model
Advanced BIOS Parameters for C220 and C240 Servers