The Dutch VMUG Event 2010 – Recap.

Just a quick blog about the sessions I attended at the sixth Dutch VMUG Event, which have been hold at NBC Nieuwegein. This event was the biggest so far, 750 attendees!  I blogged earlier about the sessions that I will attend so here is a quick recap. First session: VMware vCloud Director presented by Willem van Engeland (VMware) and Duncan Epping (VMware). Willem and Duncan showed us what the vCloud Directory is and what you […]


“Unable to retrieve health data from https” alert displayed in the vCenter Service Status.

I recently saw this error occur on a Windows Server 2008 R2 running VMware vCenter Server 4.1.0 (Build 258902) after changing the name of the server. Apparently, changes made to the machine name are not reflected to the installation of the VMware vCenter Converter. According to VMware KB 1025010, this alert could be triggered due to an SSL certificate issue, which would make sense since the name of the vCenter Server had been changed. Here […]


The Dutch VMUG Event 2010.

Only two weeks to go to the sixth edition of the Dutch VMUG Event! It will be held on Friday, December 10 in Nieuwegein at NBC. For more information about the Dutch VMUG Event, click here. I was looking at the agenda of the event, trying to put an interesting schedule for myself and here are the sessions that I will attend: First session: VMware vCloud Director presented by Willem van Engeland (VMware) and Duncan […]


Start and stop VMware Workstation services on your laptop – menu driven.

When you install the VMware Workstation software on your system the Workstation services (VMware Authorization Service, VMware Agent Service, VMware NAT Service, VMware DHCP Service and the VMware USB Arbitration Service) start-up type is set to Automatic by default. Since I’m not using the Workstation every time I boot up my laptop (well, almost not every time 😉 ) I’ve decided to start and stop the services manually but I did not feel like starting and stopping […]


VMware vCenter Orchestrator Community.

Just a quick post about the VMware vCenter Orchestrator. I was listening to the VMware Community Roundtable podcast on TalkShoe the other day and the topic was the VMware vCenter Orchestrator. If you are interested in the vCenter Orchestrator or you want to share your workflows or browse the discussions, this is the place to be 🙂 Cheers! – Marek.Z

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 […]


HP StorageWorks P4300 G2 SAN – Lessons learned.

There are a lot great blog posts about the HP StorageWorks P4000 SAN arrays (formally known as HP Lefthand). I think the articles written by Frank Denneman are one of the most famous 🙂 . Anyway, a few days ago I had a chance to work with the HP P4300 SAN’s myself when I was configuring a new virtual infrastructure for one of our customers. There were 4 HP StorageWorks P4300 SAN arrays, 2 at […]

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 […]