1) Checking if you can extend the current disk or need to add a new one
This is rather important step, because a disk that has been partitioned in 4 primary partitions already can not be extended any more. To check this, log into your server and run fdisk -l at the command line.
Log on to the ESXi console. Or via SSH
Get a list of all registered virtual machines, identified by their VMID, Display Name, and path to the .vmx configuration file, using this command:
Quite a few customers have asked me how to look in ESX logs themselves. They know support often requests these logs to diagnose problems and want to know what’s in these logs. Here you go. A short list of the log files found in VMware ESX Server.