Chapter 7. IBM System x3690 X5 343
7.8.4 Optimizing boot options
UEFI systems, including the x3690 X5, can take more time to start up when scaled with the
MAX5 expansion. The number of installed adapters directly affects the time that it takes for
UEFI to initialize. A simple step to reduce the overall system start-up time is to remove any
unnecessary boot devices from the boot order list. In particular, ensure that the PXE network
boot is removed from the boot order list if it is not used. PXE network boot can increase your
start-up time substantially, especially if it is also placed in the incorrect order in the boot order
list.
Use the following steps to remove entries from the Boot Order menu and to configure the
correct boot order:
1. Power on the system and press F1 on the UEFI splash panel to enter the UEFI System
Configuration and Boot Management settings panel.
2. Navigate to the Boot Manager menu by selecting Boot Manager from the System
Configuration and Boot Management menu. The Boot Manager panel displays, as shown
in Figure 7-41 on page 344.
Hyper-Threading Enabled Disabled Enabled
Execute Disable Bit
Enabled Disabled Disabled
Intel Virtualization Technology
Enabled Disabled Disabled
QPI Link Frequency Max Performance Max Performance Max Performance
IMM Thermal Mode Performance Performance Performance
CKE Low Power Disabled Disabled Disabled
Memory Speed Max Performance Max Performance Max Performance
Page Policy Closed Closed Closed
Mapper Policy Closed Closed Closed
Patrol Scrub Disabled Disabled Disabled
Demand Scrub
Enabled Disabled Disabled
Setting Virtualization Low latency HPC
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