peter79
Enthusiast
Enthusiast

Changing number of CPU's and SCSI controller type on a VM

Guys,

Im running ESX 3. and have just converted 2 physical servers (both running Windows 2003) using the vmware converter. The conversion was successfull however there are two small problems. One of the servers was assigned 4 CPU's and a BusLogic SCSI controller and the other was assigned 2 CPU's and a BusLogic SCSI.. i need to configure both VM's to have 1 CPU and LSI SCSI controllers. If I just power down the VM's an make the changes will this make the VM's unstable?

Thanks.

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6 Replies
wila
Leadership
Leadership

Unless you have the physical servers still around, I would first make a backup before starting to change a thing like this.

Here's a thread on the CPU change

As for changing over from Buslogic to LSI, as this is a Windows 2003 server, it should work as the drivers are normally included.

However you could move step by step by adding another controller (an LSI one this time) to the VM and attaching a disk there, so that you know it works and only change the other controller over to LSI after that.

Hope this helps,



--

Wil

| Author of Vimalin. The virtual machine Backup app for VMware Fusion, VMware Workstation and Player |
| More info at vimalin.com | Twitter @wilva
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Texiwill
Leadership
Leadership

Hello,

Moved to the Virtual Machine and Guest OS forum.


Best regards,

Edward L. Haletky

VMware Communities User Moderator

====

Author of the book 'VMWare ESX Server in the Enterprise: Planning and Securing Virtualization Servers', Copyright 2008 Pearson Education.

Blue Gears and SearchVMware Pro Blogs: http://www.astroarch.com/wiki/index.php/Blog_Roll

Top Virtualization Security Links: http://www.astroarch.com/wiki/index.php/Top_Virtualization_Security_Links

--
Edward L. Haletky
vExpert XII: 2009-2020,
VMTN Community Moderator
vSphere Upgrade Saga: https://www.astroarch.com/blogs
GitHub Repo: https://github.com/Texiwill
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JonRoderick
Hot Shot
Hot Shot

That's a very old document (3yrs...) - is it still relevant with ESX 3.5+?

Jon

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Texiwill
Leadership
Leadership

Hello,

Yes it is. What happens inside the VM pertaining to the HAL is independent of the virtualization layer.


Best regards,

Edward L. Haletky

VMware Communities User Moderator

====

Author of the book 'VMWare ESX Server in the Enterprise: Planning and Securing Virtualization Servers', Copyright 2008 Pearson Education.

Blue Gears and SearchVMware Pro Blogs: http://www.astroarch.com/wiki/index.php/Blog_Roll

Top Virtualization Security Links: http://www.astroarch.com/wiki/index.php/Top_Virtualization_Security_Links

--
Edward L. Haletky
vExpert XII: 2009-2020,
VMTN Community Moderator
vSphere Upgrade Saga: https://www.astroarch.com/blogs
GitHub Repo: https://github.com/Texiwill
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admin
Immortal
Immortal

Adjusting CPU should not be a problem it was NT4.0 that was fun!

but as stated above do a full backup using whatever method is comfortable

me --I'd just powerdown, convert to template, clone to a different name, convert original back to VM and them make change to the original, easiest way for me anyways. it it fails delete the deply from template with the same name.

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JonRoderick
Hot Shot
Hot Shot

I'vew just happily migrated from a uni- to a multi- and back to a uni-processor 2003 VM without any obvious issues.

What are the associated problems with running a uni-processor VM on a multi-processor HAL and do I need to be concerned?

Thanks

Jon

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