Category Archives: vSphere (ESX)

Powershell/ESXCLI – EMC VPLEX changing multipathing policy

When connecting some storage systems to vSphere, vSphere sometime doesn’t select the most optimal multipathing policy. I came across the above problem when adding an EMC VPLEX storage system to a  large vSphere 4.1 installation. vSphere selected the Fixed path multipathing policy. In smaller environments this isn’t normally a problem , but when a Fixed policy is selected in… Read More »

VMware Chargeback: Change MSSQL database IP and/or port

Yesterday I was supposed to receive last months billing reports from our vCloud Director environment. But for some reason this didn’t happen 🙁 I tried to logon to the VCCB web front end, but that wasn’t possible – the page just timed out. Then I checked the VCCB  services and all was running. Just to be sure… Read More »

VMware releases vSphere 4.1 hardening guide

In April VMware released their hardening guide for vSphere 4.1 (http://communities.vmware.com/docs/DOC-15413) , now the have also released a free tool to check your vSphere installations against their hardening guidelines. The tool is called “VMware Compliance Checker for vSphere” – http://www.vmware.com/products/datacenter-virtualization/vsphere-compliance-checker/overview.html

vSphere Client 4.1 error…

After I upgraded vSphere vCenter & Client to 4.1 258902, I been getting an error in the vSphere Client. A internal error occured in the vSphere Client. Details: Object reference not set to an instant object. The solution is provided by VMware. http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1033560 It’s just replacing a DLL file 🙂 The error is only with… Read More »

Downgrading ESX virtual hardware 7 to 4

When you upgrade your vSphere environment you normally also upgrade the VM’s virtual hardware to version 7, to take advantage of the new features. This is pretty normal procedure for all VMware admins. But in some very very rare cases you might need to move a VM upgraded to hardware version 7, to a host… Read More »

Configure IBM Blades (running ESX) and Cisco switches for failover

Using IBM Blades and Cisco switches to run your ESX enviroment? If yes, have you tested what happens if you unplug the network cables going into one switch? If you like me have bundled 2 or more cables going from one switch, to one backbone switch and done the same for the other switch, then… Read More »

Guest warning after upgrade to vSphere 4.1

After we upgraded to vSphere 4.1, the SCSI adaptor of all our WINXP guests changed from LSI Logic Parallel  to BusLogic Parallel. This change should normally not create any warnings or problems it VMware Tools are up to date. But after the upgrade all our WINXP guests got the following warning when powered on in… Read More »