esx 4.0 vmotion broken (on some VMs, not all) - not sure when/why

[thro]

Hi all,

For a while now I've been getting the following error when trying to vmotion several of my VMs:

"Host CPU is incompatible with the virtual machine's requirements at CPUID level 0x1 register 'ecx'.

Host bits: 0000:0000:0000:1000:0010:0000:0001

Required: 1000:0000:0000:100x:xxx0:0x1x:xxx0:x001

Mismatch detected for these features:

*general incompatibilities; refer to KB article 1993 for possible solutions."

Now, the thing is... all of my hosts are identical in terms of CPU. They've been happily running vmotion for the past year and a half under ESX 3.5, and these same hosts can vmotion other VMs. These same VMs have been vmotioned in the past. I'm certain they have also vmotioned in the past on ESX4 as well (to do updates via update manager after the 4.0 upgrade).

Vmware tools are up-to-date.

Any idea what gives?

I use/administer: vSphere 4 (ESX) | Workstation 6.5 | Vmware Server 2.0 | Windows 2003 | FreeBSD | Redhat EL

[krowczynski · Accepted solution]

Hi,

check this out if it can help you.

http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=1011294&sl... 0 50459451

MCP, VCP

[thro]

Legend... got it in one.

Cheers

I use/administer: vSphere 4 (ESX) | Workstation 6.5 | Vmware Server 2.0 | Windows 2003 | FreeBSD | Redhat EL