Before you upgrade your ESXi 5.5 Server to the new version of ESXi 6.0, you have to check the support status of your hardware and the requirements of firmware and driver versions.
To apply updates to a standalone host you have to do some steps with putty and the esx command line, because vCenter Server and Update Manger are missing in this case.
It is also possible to do a complete upgrade within putty and esx command line.
In vSphere 5.5 and 6.0 a new command was given to esxcli. With this command you can reclaim deleted blocks on thin-provisoned LUNs.
You could run the mechanism in production time. This might sound good…. Our maintainance windows gets smaller and smaller with every new service and if you could do maintainance when everybody could work is that great.
BUT one moment!
The ESXi host which runs the reclaim would get very high cpu usage and might costops VMs within the host. Especially the first run will take a lot of time.
The storage multipathing policy in ESXi configures in which way ESXi uses the availiable paths his LUNs.
This article discribes the different policies und explaines how to change policies for connected LUNs. Additional I show how to change the default policies for new connected LUNs.
To apply updates to a standalone host you have to do some steps with putty and the esx commandline, because vCenter Server and Update Manger are missing in this case.
It is also possible to do a complete upgrade within putty and esx commandline.
To do the upgrade these steps are neccessary: