Vmotion

55 pts.
Tags:
Virtualization
VMotion
VMware
Hi Guys who do u doing iam facing a problem with vmotion in VI3.0.2 i can vmotion 32bit OS but iam unable to migrate 64bit OS do any one faced this problem
ASKED: February 20, 2008  4:16 AM
UPDATED: March 5, 2008  10:07 PM

Answer Wiki

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I found a couple of pages which you might find useful.

<a href=”http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&externalId=1901″>http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&externalId=1901</a>

and

<a href=”http://communities.vmware.com/message/630478″>http://communities.vmware.com/message/630478</a>

but keep in mind that the processors you are talking about have different architectures, You’re not going to be able to start a 64bit OS one 32bit host machine– but you could start a 32bit VM on a 64 bit host. Simply put the data/IO path isn’t wide enough and the processor instructions are so different on a 64bit OS that it will not run on a 32bit host machine. Think of it this way— you couldn’t install a 64bit os on a 32 bit P4 system.

To make life easier only cluster ESX hosts which are capable of VMotion, such as all 64bit and all 32, if you have 32 bit machines on 64bit architecture then seperate them and switch off the 64bit enhancements to not confuse yourself. as the guys says architecture is the key however it does not have to stop you if you plan ahead and implement accordingly, use the 32bit hardware for machines that do not migrate such as print servers etc, easy planing easy admin.

hope this helps

Paul

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  • Jerry Lees
    Arun, I hope this answer is not to simplistic. But please keep in mind that you can not generally vmotion between two machines that have different processors in them (even if the differences are only very slight, like two different versions of a 3.0G P4). Additionally, you won't be able to start a 64bit OS VM on a 64 bit machine and migrate it to a 32 bit machine.
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