Adding 2nd CPU to ML370

[Michael Grech]

I have an ML370 with one CPU. The server is running Windows 2000 Server. I want to add a second CPU. Will Windows recognize it or do I need to do something special to Windows to make it use the new CPU? Thanks.

[Claude Boileau]

Hi Michael,

One of the most important step is the system board firware update and for 2000 here is what I found on the Microsoft site: and don???t select the Compaq system pro.
SUMMARY
Windows 2000 provides support for single or multiple Central Processing Units (CPU); however, if you originally installed Windows 2000 on a computer with a single CPU, the hardware abstraction layer (HAL) on your computer must be updated for your computer to recognize and use multiple CPUs. This article describes how to add support for multiple processors in Windows 2000.
Installing Support for Multiple CPUs
1. Click Start, point to Settings, point to Control Panel, and then click System.
2. Click the Hardware tab, and then click Device Manager.
3. Double-click to expand the Computer branch. Note the type of support that you currently have.
4. Double-click the computer type that is listed under the Computer branch, click the Drivers tab, click Update Driver, and then click Next.
5. Click Display a list of known drivers for this device, and then click Show all hardware of this device class.
6. Click the appropriate computer type (do not change from non-ACPI to ACPI computer types), click Next, and then click Finish.
The following table lists and describes each HAL.
HAL Description
---------------------------------------------------------------------------
ACPI MultiProc Use for a multiple-processor ACPI computer

ACPI UniProc Use for a ACPI multiple-processor board but with a
single processor installed

Advanced Use for a single processor motherboard with single
Configuration processor ACPI computer
Power Interface PC

Compaq Systempro Use for a Compaq Systempro computer

MPS Uniprocessor PC Use on non-ACPI computers dual processor motherboard
with a single processor installed

MPS Multiproc PC Non-ACPI computers with a dual processor running

Standard PC Any Standard PC, non-ACPI, or non-MPS. Could be a 386,
486, Pentium, Pentium II, or Pentium III

Standard PC
with C-Step i486

NOTE: You can use this procedure only to upgrade from a single-processor HAL to a multiple-processor HAL. If you use this procedure to change from a standard HAL to an ACPI HAL (for example, after a BIOS upgrade) or vice-versa, unexpected results may occur, including an inability to boot the computer

REFERENCES:For additional information how to troubleshoot Windows 2000 HAL issues, click the article number below to view the article in the Microsoft Knowledge Base: 237556 Troubleshooting Windows 2000 Hardware Abstraction Layer Issues

Hope this will help
claude