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jrr001
Enthusiast
Enthusiast

Proper BIOS Settings for ESX 3.5 update 2 +

Using IBM Servers and noticed Bios CPU options that I wanted to run by everyone and get some opinions on. Models are IBM Xseries 3950 and HS21 blades.

If you have opinions I am interested...

Processor Adjacent Sector Prefetch: enabled (suggestion from IBM redbook is to have enabled)

Processor Hardware Prefetcher: disabled (suggestion from IBM redbook is to have disabled for ESX 2.x, what are people using for ESX 3.x?)

Powerexecutive Power Capping: ???? I am thinking disabled...I want the hypervisor making these decisions????

Processor Performance States: ????? not sure best setting here?

Enhanced C1 Power State: ??? not sure best setting?

Processor Execute disable bit: ??? older ESX needed this off...think advised to have on now..but has to be consistent across servers to prevent vmotion problems?

Thanks!

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3 Replies
JonRoderick
Hot Shot
Hot Shot

Hi

am using 3650s and the only thing I change is to make sure the VT technology and No Execute bit are both ENABLED for ESX 3.5 (required for EVC to work).

Cheers

Jon

jrr001
Enthusiast
Enthusiast

thanks for the feedback.

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jrr001
Enthusiast
Enthusiast

New guide from VMware that is a good read. (See page 15 for BIOS stuff)

In particular:

Enable hyper-threading

Disable C1E and other power-saving modes

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