As you can see below, the Coredumps is full. It shows 100%.
To empty it, simply login to the appliance via SSH. I use Bitvise, a great utility, in the example below.
From there, just browse to the directory where we need to delete the files. As shown below, I have a lot of files that I no longer require.
It’s a matter of deleting them. The result is a clean directory 🙂
And the core dump now shows a healthy usage.
Speaking of vCenter, I’d recommend you deploy the vCenter Support Assistant. You should also upgrade your vCenter independently of your ESXi. I have provided some articles on vSphere 6.0, which I hope you find useful: