prakash9339 wrote:
5.0.0 to 5.1 upgrade is there any prob with existing vm in data store...
Was that a question?
I think you should try 5.0 U2 first, since your vCenter Server 5.0 can still manage the hosts then.
For ESXi 5.1 you would need to upgrade your vCenter to 5.1 first, which is quite a large upgrade.
Regards