ESXi 5

Upgrade vCenter Server 5.x to vCenter Server 5.1

As you probably all know, the vSphere 5.1 and vCloud Suite binaries have been made available for download yesterday. The vCenter Server ISO is now about 3,4 GB in size which is quite significant compared to 2,4 GB in version 5.0 Update 1. The size of ESXi hypervisor is now about 307 MB which is about 10 MB more than the version 5.0 Update 1. Before you begin with upgrading your production environment, make sure […]


What’s new in VMware vSphere 5.1, new technical whitepapers available!

In addition to release of vSphere 5.1, there are some new whitepapers available from VMware. What’s new in VMware vCenter 5.1 What’s new in vCloud Director 5.1 What’s new in VMware vSphere Storage Appliance Introduction to VMware vSphere Replication Introduction to VMware vSphere Data Protection What’s New in VMware vSphere 5.1 – Networking What’s New in VMware vSphere 5.1 – Platform What’s New in VMware vSphere 5.1 – Storage What’s New in VMware vSphere 5.1 […]


What’s New in VMware vSphere 5.1?

Today VMware announced the release of vSphere 5.1. At the general session at VMworld 2012 VMware also announced that the vRAM licensing is gone. vSphere 5.1 will be licensed per CPU/Socket like in the pre-vSphere 5.0 era. This new release contains the following new features and enhancements, I must say, it looks awesome. Some of the new features will make our work a lot easier. Compute Larger virtual machines – Virtual machines can grow two […]


Uninstall Volume Shadow Copy Service Support and Shared Folders from VMware Tools

Lately, I have observed an issue during the back-up with the Symantec Back-up Agent for VMware Virtual Infrastructure. The back-up attempt fails stating that it was unable to quiescent a file system and an Event ID 34113 is logged in the Windows application log. According to the Symantec article TECH128039, this issue can be solved by reinstalling the VMware Tools on the guest virtual machine without the VMware VSS Driver and VMware File system Sync […]


Assign a static MAC Address to a Virtual Machine on VMware infrastructure.

A few days ago I was P2V’ing some servers for a customer. The servers had application license bound to the MAC address of the NIC adapter so I had to change the auto-generated MAC address to a static one. Follow these steps to change the MAC address from auto-generated to static. First, remove the VM from the vCenter Server inventory. Open the datastore containing the VM and download the .vmx file. Optionally, make a back-up […]


Dell PowerEdge R710 BIOS settings for VMware vSphere 4.x.

Recently, I was involved in a big infrastructure refreshment project for one of our customers across different locations in Europe. The old hosts were replaced with the brand new Dell PowerEdge R710 hosts with Intel X5650 processor and 96 GB of memory. All hosts were installed with the vSphere Hypervisor (ESXi). Here are some best practice BIOS settings that we used during the project. Power on the server and press F2 during the initialization process to […]

unhide recovery partition

Configuring software iSCSI Round Robin MPIO on ESX 4.x.

This is just a quick post about configuring software iSCSI Round Robin MPIO (2:1 mapping) on an ESX 4.x server. Here is a quick overview of the procedure: Create VMkernel ports on a vSwitch Configure the VMkernel ports Assign physical NIC’s to the vSwitch Configure the uplinks on the vSwitch Enable software iSCSI initiator Find and add VMkernel ports to the iSCSI initiator Add an iSCSI target to the iSCSI initiator Rescan the HBA adapter […]

ESXi 4

Boot ESX 4 from SAN on a failover LUN – Lessons learned.

Is it possible to boot an ESX 4 host from a LUN that has been “failed over” to another physical location? Yes, it is possible but there are some serious caveats by doing this. Please consider the following scenario: 2 datacenters: site A production (active), site B failover (passive) In each site an identical SAN array; LUN mirroring between the 2 arrays through a dedicated Fiber Channel link In each site 2 identical ESX hosts and […]