When the master host in a vSphere HA cluster can not communicate with a slave host over the management network, the master host uses datastore heartbeating to determine whether the slave host has failed, is in a network partition, or is network isolated. If the slave host has stopped datastore Read more…
It is very important that you install VMware Tools in the guest operating system. With the VMware Tools installed VMs support significantly faster performance, time synchronization, and other enhanced features. Below are the steps to install the VMware Tools on CentOS. 1. Install the prerequisites into your CentOS. If asked Read more…
Recently, I ran a test of a SRM Recovery Plan for a new set of Linux VMs I inherited. The first test didn’t go so well and returned the error “Error – The guest operating system ‘centos64Guest’ is not supported”. After doing a cleanup of the test Recovery Plan, I Read more…
Recently I encountered some VM refresh issues in View I felt would be helpful to share. Using the View administrator I attempted to refresh a couple of linked clones manually. Some of the refresh operations completed successfully, but some did not. Upon investigating the recorded View events I found the Read more…
As of vSphere 5.5 when you create VMs the default hardware version is 8. However, there is an option to upgrade the virtual hardware to version 10. While I’m sure there are benefits to version 10 over 8, I’m only advising you that in upgrading VM hardware version you will Read more…
When you install ESXi on flash media you will likely see the error “System logs on host are stored on non-persistent storage” as shown below below. The fix is pretty easy. Browse to an attached datastore, and create a folder naming it as you see fit. If you are using Read more…
Out of the past 3 upgrades I performed to VMware vCenter Server Appliances services began to fail thereafter. The upgrade was to 5.1.0.5300 Build 947940. Periodically every few days, or hours the appliance is reachable, but you will not be able to login to it via the vSphere client. You will see the Read more…
Recently I had an issue migrating a Windows Server from a physical system to a VM that had smaller than 2 TB volumes but the disk were configured as GPT. Additionally the systems was using EFI firmware. Below is the VMware KB confirming that you cannot use the VMware converter to P2V Read more…
Recently I needed to monitor a network segment of a client’s network. They were relatively small but were having over utilization issues. Using Cacti, which is a free Linux based SNMP monitoring/graphing program I was able to track network performance metrics such as bandwidth and throughput of switches and firewalls. Read more…
It is very important that you install VMware Tools in the guest operating system. With the VMware Tools installed VMs support significantly faster performance, time synchronization, and other enhanced features. Below are the steps to install the VMware Tools on Debian 1. Install the prerequisites into your Debian OS. If Read more…