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How to Upgrade VMware ESXi 5.5 to 6.0


VMware provides several ways to upgrade VMware ESXi hosts.
Upgrade or migrate  interactively using an ESXi installer ISO image on CD/DVD or USB flash drive 
You can run the ESXi 6.0 installer from a CD/DVD or USB flash drive to do an interactive upgrade or migration. This method is appropriate for deployments with a small number of hosts. The installer works the same as for a fresh installation, but if you select a target disk that already contains an ESXi 5.5 installation, the installer upgrades the host to 6.0 and gives you the option to migrate some existing host settings and configuration files, and preserve the existing VMFS datastore.
Here we are going to Upgrade or migrate to ESXi 6.0 interactively using an ESXi installer ISO image on CD/DVD or USB flash drive.
So lets start,
My current version of ESXi is 5.5  as shown below,
How to Upgrade VMware ESXi 5.5 to 6.0 - 01
Now turn of the ESXi 5.5 server & mount ESXi 6.0 ISO file & power on the ESXi server for upgrade,
 How to Upgrade VMware ESXi 5.5 to 6.0 - 02

How to Upgrade VMware ESXi 5.5 to 6.0 - 03

 How to Upgrade VMware ESXi 5.5 to 6.0 - 04
Press F11 to accept the EULA and continue.
 How to Upgrade VMware ESXi 5.5 to 6.0 - 05
Select the virtual disk where you want to install, and press Enter to continue.
 How to Upgrade VMware ESXi 5.5 to 6.0 - 06
Select option “Upgrade ESXi, preserve VMFS datastore” as we want to retain old VMFS partition as it has our Virtual machines.
 How to Upgrade VMware ESXi 5.5 to 6.0 - 07
Confirm that the information on the screen is correct, then press F11 to start the installation.
 How to Upgrade VMware ESXi 5.5 to 6.0 - 08

 How to Upgrade VMware ESXi 5.5 to 6.0 - 09
When the upgrade is complete, Press Enter to reboot.
 How to Upgrade VMware ESXi 5.5 to 6.0 - 10
Now you can see ESXi 5.5 is upgrade to ESXi 6.0 without any data loss…
 How to Upgrade VMware ESXi 5.5 to 6.0 - 11