Is there a limit on the number of times you can upgrade an ESXi host?

[pegasus20111014]

We have VMware hosts that have been updated from ESXi 4.1 to 5.1 using Update Manager.  Should we be ok to update these servers to either ESXi 5.5 or 6.0 without having to do a new install and reformat?

Thanks

[jrmunday · Accepted solution]

I'm not sure if there is a hard limit to the number of times you can upgrade, but upgrading from ESXi 4.1 to 5.1 and then to 5.5 is supported and will work (I just tested this in my lab).

For reference, here are the relevant KB articles;

VMware KB: Methods for upgrading to ESXi 5.5

Supported Upgrades to ESXi 5.5.x

Cheers,

Jon