Is Vcenter Server 4.0 Build 258672 compatible with ESXi 4.1 or 5.0

Hi,
Am using Vcenter Server 4.0 Build 258672 (Reckon its vcenter 4.0 Update 2) in our environment. Our current Esxi hosts are 4.0, 392990.
We are thinking of incorporating new ESXI hosts to our infra. Thus, would like to know if our Vcentre version is compatible with ESXi 4.1 or 5.0 hosts. Any known issues or impact ?
Thanks
GGMUAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
im afraid you must upgrade to vSphere vCenter 4.1 to support ESXi 4.1, and vSphere vCenter 5.0 to support ESXi 5.0, 4.1 and 4.0.

also note 4.1 vcenter and later are 64 bit only and require a 64 supported OS.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
So to summarise, your vCentre version is not compatible, you need to upgrade.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
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GGMUAuthor Commented:
Thanks for your advice. Based on ur experience, isit easy to upgrade to ESXi 4.1 ? Any known impact ? Thanks
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes, it's fairly straightfoward, the biggest issue is making sure you have a 64 bit OS Server, e.g. Windows 2003 64 bit or Windows 2008 64 bit.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
and use the Data Migration Utility. (if you really want to keep performance, and tasks and event histories).
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aillezCommented:
if you vCenter 4.0 was built in 32bit OS you need to use Migration tools to migrate your vCenter DB from 32bit to 64bit
See this KB
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1021635

I just upgrade vCenter 4.0 32bit to vCenter 5.0 & use migration tools
it's doesn't hard but for me it's have some issues like successful restore but database is blank
but the problem was solved.
So if you want to know more just ask (If you want to migrate to vCenter 5.0)

& for your question I think vCenter 4.0 will not be able to manage newer version of esx,esxi
so you need to upgrade to the version of esx,esxi you want to manage like
if you want to manage 4.1 So you need to upgrade to at least vCenter 4.1
for esxi 5.0 you need to upgrade to vCenter 5.0

hope I can help you.
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