Upgrade from ESXi 4.1 to version 5

Can someone please provide me with a quick run-down in what
I will need to do to upgrade a ESXi 4.1 infrastructure to ESXi 5?

Thanks in advance
Jerry SeinfieldAsked:
Who is Participating?
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Upgrade to vCenter 5.1 first if you have vCenter 4.1.

then insert the ESXi 5.0 cdrom, boot from it and complete an inplace upgrade.

if you are using Dell, IBM, HP hardware make sure you download the OEM version from their websites.
Paul SolovyovskySenior IT AdvisorCommented:
If you have vCenter you can upload the ESXi 5 ISO to to your vCenter update Manager and use it for a straight upgrade.

If you do not have vCenter you can burn the ESXi 5 ISO and use a CD to upload.  It will ask you if you want to keep the datastore and it will take it from there.
Nagendra Pratap SinghDesktop Applications SpecialistCommented:
These two should be OK for you to follow.

And if possible, do it on a host with only a test VM.
Upgrading to ESXi 5.0 best practices


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