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Esxi not detected for upgrading from 5.0 to 5.5

I upgraded 1 of 2 hosts just fine, but the second does not recognize that Esxi is installed on either virtual disk.
When using an ISO to upgrade the server, it wants to do a clean install. I have a lot of configurations with ISCSI and vmotion networking, that I really do not want to replicate with a clean install if I don't have to.

I am going from version 5.0.0 build 469512 to esxi 5.5.

Any ideas on anything I can look at to see why it is not recognizing that it is installed (Installed on 1st Virtual disk)

BKennedy2008

ASKER

I also tried from 5.0 to 5.1 and is not recognized either

BKennedy2008

ASKER

Just noticed that the datastore that the ESXi is installed is at VMFS3. DO I need to upgrade that store to version 5 prior to upgrading the ESXi

BKennedy2008

ASKER

Upgraded to vmfs5 and still same results. Will do fresh install tomorrow if no ideas

ASKER CERTIFIED SOLUTION

Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

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BKennedy2008

ASKER

I did- Thanks. Seems like it will be the route I will take.

Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

Just check your hardware is supported for ESXi 5.5, requriements have changed, especially with the CPUs.

BKennedy2008

ASKER

Good to go, thanks. Have 2 Exact same servers. Just weird 1 did not want to do an upgrade.

Thanks

Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

Try my article, and do, an offline upgrade, if you want to try....

HOW TO: Upgrade from VMware vSphere Hypervisor ESXi 5.1 to VMware vSphere Hypervisor ESXi 5.5 for FREE

The above instructions also work for 5.0!

BKennedy2008

ASKER

I have not dived into it yet, but would like to see an article on deploying the add-on VUM.
I will try out the command line upgrade.
thnks