VMware vSphere Troubleshooting Update 1 ESXi 5.0 vCenter Server 5.0

About this manual

This document serves as a troubleshooting guide for VMware vSphere environments, specifically supporting vSphere Troubleshooting Update 1 for ESXi 5.0 and vCenter Server 5.0. It is intended for experienced system administrators familiar with virtual machine technology and datacenter operations. The guide addresses a wide range of potential issues, including virtual machine power-on failures, host certificate errors, cluster admission control problems, and storage performance issues.

What's inside

• Troubleshooting Virtual Machines
• Troubleshooting Hosts
• Troubleshooting Clusters
• Troubleshooting Storage
• Troubleshooting Licensing
• Troubleshooting Fault Tolerant Virtual Machines
• Troubleshooting vSphere HA Host States
• Troubleshooting vSphere HA Failovers
• Troubleshooting Storage I/O Control
• Troubleshooting Storage DRS

Specifications

Frequently asked questions

Where can I find more recent editions of this document?

You can check for more recent editions by visiting the VMware support publications website.

What is the cause of the error 'Hardware Virtualization Not Enabled' when powering on a Fault Tolerant VM?

This error occurs because Hardware Virtualization (HV) is not available on the ESXi server, either due to unsupported hardware or because it is not enabled in the BIOS.

How can I resolve the issue where a Secondary VM degrades the performance of a Primary VM?

Set an explicit CPU reservation for the Primary VM at a MHz value sufficient to run its workload at the desired performance level.