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Vcenter 6.5 cluster different3/17/2024 ![]() ![]() The upgrade is a one click process (available when a VM is powered off). When we have to upgrade HW, we should do it on the older ESXi hosts as we can not choose the hardware version during the HW upgrade. However, an upgrade of HW is not required if new features (e.g. The highest version of virtual hardware compatible for both version of ESXi is HW 10. In case mentioned above, customer have VMs with Hardware (HW) Version 9 (vSphere 5.1) and VMs will be migrated to vSphere 5.5 (HW 10) and vSphere 6.0 (HW 11). ![]() Newer ESXi hosts can run virtual machines with an older virtual hardware version but VMs with newer virtual hardware versions cannot be powered on on older versions of ESXi. There are some important points that we should discuss when we have to keep such cluster for a while: □Įach version of ESXi host provides new version of virtual hardware. As they did not build a cluster based on identical physical servers and two of servers are not supported by vSphere 6.0, it was necessary to build a “mixed cluster" - based on 5.5.x and 6.0.x ESXi hosts. Our customer needed to migrate their vSphere environment from version 5.1 ( caused of End of Support Life) to the latest version supported on their physical infrastructure. I had a discussion with my colleague about mixed version of ESXi hosts. ![]()
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