Hi,
We are trying to upgrade the ESXi from 6.5.0u1 to 6.7.0u1 to see if it improves the overall performance. However, when we do, it complained that 'VMFS cannot be upgraded, continuing will wipe all data'! So, we cancelled it and the server has rebooted back into VMware.
I would like to know what are the best ways to upgrade the ESXi without losing the data of the VMs running on ESXi.
One of the ways I know is to use bootable media of the new version. However, I would like to know is there any other way apart from using the bootable media of ESXi new version? Also, does the automatic upgrade (when it scans the storage and finds an existing ESXi version and prompted to upgrade) provides the guarantee to not lose the running VMs data if we choose to proceed with this option?
Thanks for your help in advance.
Regards,
Chirag